Notes on Sources of Islamic Law (Primary & Secondary)

Distinction Between Primary and Secondary Sources

Primary vs Secondary is not a Qur’ānic classification but a juristic tool built from four attributes.

1. Unanimous acceptance – Primary are unanimously accepted by the four Sunnī schools (Qur’ān, Sunnah, ijmāʿ, qiyās).
   • If the circle is widened to Shīʿah or Ẓāhirī, ijmāʿ and qiyās drop out.
   • Sources only some schools accept (e.g.
   istiḥsān Ḥanafī/Mālikī) are secondary.

2. Mode of derivation – Primary are naqlī (transmitted); secondary are mainly ʿaqlī (rational).

3. Epistemic value – Primary are definitive (qatʿī) “in the aggregate”; secondary are probable.

4. Capacity for further extension – Rules drawn from primary sources can themselves be extended by rational tools; rules derived from secondary sources cannot.

Reversing these attributes defines secondary sources: mostly rational, disputed, probable, and dependent on primaries for content.

Grades / Order of Sources during Ijtihād

Classical “natural” order: $\text{Qur’ān} \rightarrow \text{Sunnah} \rightarrow \text{Ijmaʿ} \rightarrow \text{Qiyās}$
Evidences:
• $Q\,4{:}59$ – “refer to Allah and the Messenger…”
• Ḥadīth of Muʿādh ibn Jabal (judging in Yemen).
• Letters of ʿUmar to the judge Shurayḥ.

Qualifications:

1. Qur’ān & Sunnah are consulted together; the Sunnah restricts, qualifies and explains Qur’ānic wording (e.g.
   theft $\rightarrow$ niṣāb, ḥirz; zakāt $\rightarrow$ specific assets).

2. Definitive Sunnah (mutawātir, qatʿī al-dalālah) outweighs an ambiguous Qur’ānic verse.

3. Ijmāʿ, once established, has precedence over solitary readings of text—analogy with modern stare decisis.

4. Broad jurisprudential principles (Hanafī, Mālikī maxims) can override a solitary report.

Thus the search‐sequence is complex, not mechanical; uṣūl al-fiqh exists to untangle it.

The Qur’ān as Source

Definition (al-Bazdawī):
$\text{al-Qur’ān}= \text{Speech of Allah revealed to Muḥammad, written in maṣāḥif, transmitted by }\;tawātur$
Key attributes:

1. Arabic wording and meaning are revealed (excludes Sunnah, tafsīr, translation).

2. Transmitted by continuous, multiply attested chains (seven canonical readings; non-tawātur variants excluded).

3. Inimitability (Iʿjāz) – impossibility for humans to produce the like.

Revelation & Recording: gradual (asbāb al-nuzūl), memorised, written by official scribes. During Ramaḍān Jibrīl reviewed it annually; last year of life twice. Full compilation under Abū Bakr by Zayd b.
Thābit, relying on both memorisation and written fragments.

Legal Content: ≈ $600$ verses carry aḥkām – $\approx 500$ on ʿibādāt, $\approx 100$ on muʿāmalāt (e.g.
$70$ family, $80$ finance, $30$ criminal, $10$ constitutional, $25$ international). Categories:

1. ʿAqāʾid (theology).

2. Self-discipline & ethics.

3. Conduct rules:
   a) worship; b) muʿāmalāt (private/public, procedural/substantive).
   Few verses are self-evident; the majority require Sunnah and juristic interpretation.

The Sunnah

Literal sense: “trodden path.” Technical senses vary (recommended acts; contrast to bidʿah; practice of Companions). Juristic sense: “Whatever is transmitted from the Prophet – words, deeds, tacit approvals.”

Classifications

A. By channel of aḥkām:
• Qawliyah – sayings aimed at legislation (e.g.
$\textit{innamā al-aʿmāl bi-niyyāt}$).
• Fiʿliyyah – acts with legal content (e.g.
prayer method). Ordinary human habits or acts exclusive to him (multiple wives) are not legal proofs.
• Taqrīriyyah – tacit approval (silence toward Companions’ actions, e.g.
Muʿādh’s ijtihād method).

B. By mode of transmission (hadith science):

1. Muttaṣil (continuous)
   a) Mutawātir – narrated by crowds in every generation (wording or meaning).
   b) Mashhūr (Ḥanafīs: midway strength; majority: counts as āḥād).
   c) Āḥād / Khabar Wāḥid – solitary or few narrators.

2. Ghayr-muttaṣil
   a) Mursal (name of Companion missing)
   b) Munqaṭiʿ (gap other than Companion).

Juristic Conditions

• Mutawātir & mashhūr – binding, yield certainty.
• Khabar wāḥid:
– Ḥanafī: accept if (i) narrator did not act against it, (ii) matter not of universal need, (iii) not in conflict with established principles; exception for senior mujtahid Companions’ reports.
– Mālikī: must not contradict Medinan practice.
– Shāfiʿī & Ḥanbalī: only require an unbroken, sound chain (Aḥmad occasionally accepts weaker reports over qiyās).
• Mursal: Shāfiʿī rejects unless corroborated; Ḥanbalī sometimes prefers over analogy.

Status of Sunnah vis-à-vis Qur’ān

The Sunnah derives authority from the Qur’ān yet functions as:

1. Commentary/clarification – restricts general, qualifies absolute, explains ambiguous terms (prayer times, zakāt kinds, riba details).

2. Linker – attaches new cases to Qur’ānic principles (predatory animal meat $\rightarrow$ classed among khabāʾith).

3. Analogiser – extends Qur’ānic rule (two sisters $\rightarrow$ aunt-niece marriages).

4. Principle-maker – e.g.
   $\textit{lā ḍarar wa-lā dirār}$; Qur’ān provides instances, Sunnah formulates the maxim.

5. Lexical elaboration – “white/black thread” interpreted as dawn/darkness.

Consensus (Ijmāʿ)

Definition: Unanimous agreement of mujtahids of the Ummah in a single era, after the Prophet’s death, on a sharʿī ruling.
Conditions (majority):

1. Participants are mujtahids.

2. Unanimity.

3. Muslim community only.

4. Post-Prophetic.

5. Same era/generation.

6. Subject is a legal rule.

7. Based on recognised evidence (sanad).
   Disputed conditions: need for participants’ death, or tawātur transmission.

Types:
• Ijmāʿ ṣarīḥ / qawlī – explicit assent; definitive evidence.
• Ijmāʿ sukūtī – tacit silence; majority Ḥanafī & Ḥanbalī: definitive; Shāfiʿī & Mālikī: non-definitive or non-ijmāʿ.

Modern role parallels doctrine of precedent: unanimous full-bench ruling of highest Muslim court per jurisdiction.

Qiyās (Analogy)

Technical formula: Assigning the ruling (ḥukm) of an original case (aṣl) found in text to a new case (farʿ) on the basis of a common operative cause (ʿillah).
Elements: aṣl, ḥukm al-aṣl, ʿillah, farʿ (leading to ḥukm al-farʿ).

Classic examples:
• Intoxicants – wine ⇒ whiskey/beer (ʿillah: intoxication).
• “Murderer does not inherit” ⇒ murderer-legatee excluded (ʿillah: hastening benefit via crime).
• Competing offers, Jumuʿah trade ban, etc.

Qiyās jalī – manifest analogy, ʿillah obvious; Qiyās khafī – concealed, ʿillah less apparent; its practice is istiḥsān.

Istiḥsān (Juristic Preference)

Core idea: relinquishing a strict analogy for a stronger evidence—text, ijmāʿ, necessity, or subtler analogy.
Forms:

1. Preferring hidden analogy over manifest.

2. Preferring a general principle/maxim.

3. Creating exception due to stronger proof.
   Examples:
   • Forgetful eater during fast – exemption preferred over analogy (ḥadīth).
   • Salam contract allowed despite ribā-style delay (textual exception).
   • Multiple death-causers all liable (public interest).

Istishāb al-Ḥāl (Presumption of Continuity)

Not a creative source but procedural presumptions:

1. Permissibility default – $\textit{al-aṣl fī al-ashyāʾ al-ibāḥah}$ (qualified by known prohibitions).

2. No-liability default (barāʾah aṣliyyah).

3. Certainty not removed by doubt – $\textit{al-yaqīn lā yazūlu bi-sh-shakk}$.

Maṣlaḥah Mursalah (Unrestricted Public Interest)

Using undifferentiated welfare considerations to legislate where no specific text exists and the benefit aligns with maqāṣid (preservation of dīn, life, intellect, progeny, wealth).
Classic instances:
• Compilation of Qur’ān.
• Executing multiple conspirators for single murder (ʿUmar).
• Artisan liability reversal.
• War taxes when Bayt al-Māl empty (Ghazzālī).
• 80-lash wine penalty by analogy with qadhf.

Sadd al-Dhariʿah (Blocking Lawful Means to Unlawful Ends)

Mālikī principle: prohibit a permissible act whose dominant probability leads to ḥarām (e.g.
poppy cultivation $\rightarrow$ narcotics). Often treated as a subset of maṣlaḥah.

Opinion of a Companion (Qawl al-Ṣaḥābī)

Ḥanafīs: preferred over later qiyās, especially on quantitative matters (niṣāb, dowers, menstrual/gestation periods). Potential hidden textual basis.
Shāfiʿīs: not binding; discretionary.
Agreement that Tabiʿūn opinions are non-binding.

Earlier Scriptures (Sharʿ Man Qablanā)

Four categories:

1. Rules re-affirmed in Qur’ān/Sunnah – binding (e.g.
   fasting: $Q\,2{:}183$).

2. Earlier rules mentioned then abrogated (e.g.
   dietary laws).

3. Rules only in former texts – not binding.

4. Rules mentioned without clear status – debated.
   Qur’ān/Sunnah ultimately confer any authority; reports from People of the Book not accepted due to textual alteration.

Custom (ʿUrf)

Not an automatic source; raw social practice must pass Islamisation test.
A. Qawlī usage:

1. Prophetic-era Arabic.

2. Juristic technical meanings (ʿurf sharʿī).

3. Local trade terminology – valid if consistent with sharʿī requirements.
   B. Fiʿlī practice:

4. Pre-Islamic & Prophetic customs adopted/rejected through Sunnah.

5. Later customs scrutinised by jurists and absorbed only when compatible.
   Therefore prevailing Western-origin laws in Muslim lands cannot be rubber-stamped as “custom”; each rule must be assessed against uṣūl principles.

Islamic Law and Roman Law

Borrowing is a human constant. Similarities may stem from:
• Earlier Near-Eastern legal influence on both Rome and later Islam.
• Independent parallel reasoning.
• Selective adoption followed by juristic filtration (Islamisation test).
Hence claims of wholesale borrowing (Weber, Schacht, Crone) overlook methodological transformation within uṣūl al-fiqh.

Consolidated Map of Sources

Primary (agreed, transmitted, definitive, extensible):
$\small{ \text{Qur’ān},\; \text{Sunnah},\; \text{(Ijmaʿ)},\; \text{(Qiyās)} }$
Secondary (probable, rational, disputed, dependent):
• Rational: Qiyās (if excluded), Istiḥsān, Istishāb, Maṣlaḥah Mursalah, Sadd al-Dhariʿah
• Transmitted: Qawl al-Ṣaḥābī, Sharʿ Man Qablanā, ʿUrf

Each secondary source either extends, restricts, or operationalises the primary texts, providing the jurist a structured yet adaptable toolkit for ijtihād in both classical and modern settings.

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