Every narrator gets a grade: Before grading a Hadith, scholars grade each narrator in its chain. A Thiqa narrator is reliable — just, Imami Shia, and accurate in memory. A Hasan narrator is good — praised by scholars, but never explicitly declared reliable. A Muwaththaq narrator is declared reliable, but is not Imami Shia. A Majhul narrator is unknown — the Rijal books say nothing about him. A Da'if narrator is weak — criticised for a specific reason. A Kadhhab is a known liar.
The chain takes the lowest grade: If all the narrators are Thiqa, the Hadith is Sahih (authentic) — binding proof for Fiqh and theology. A mix of Thiqa and Hasan gives Hasan (good) — accepted for Fiqh by most scholars, a little below Sahih. If one narrator is Muwaththaq, the Hadith is Muwaththaq (reliable) — accepted for Fiqh, especially for non-doctrinal matters. If one narrator is Majhul or Da'if, the Hadith is Da'if (weak) — it cannot prove a ruling on its own. If any narrator is a Kadhhab, the Hadith is Mawdu' (fabricated) — rejected entirely, with zero weight.
A famous Sahih example: The Al-Kafi chain from Topic 1.2 — Al-Kulayni ← Ali ibn Ibrahim al-Qummi (Thiqa) ← his father Ibrahim (Thiqa) ← Ibn Abi Umayr (Thiqa) ← Hisham ibn al-Hakam (Thiqa) ← Imam al-Sadiq (as). All Thiqa — so the Hadith is Sahih.
The grade ladder: Sahih → Hasan → Muwaththaq → Da'if → Mawdu'. The first three are accepted for Fiqh. Da'if needs extra support. Mawdu' is rejected outright.
Example
Think of school grades: A, B, C, and fail. A chain of A-grade narrators gives an A-grade Hadith. One C-grade narrator pulls the whole Hadith down to C. And one narrator who is a known liar fails the whole Hadith at once — no matter how good the others are.
Key Terms
- Sahih (صحیح) — authentic; every narrator is Thiqa and the chain is unbroken
- Hasan (حسن) — good; accepted for Fiqh, a little below Sahih
- Muwaththaq (موثّق) — reliable; the narrator is declared reliable but not Imami Shia
- Da'if (ضعیف) — weak; it cannot prove a ruling on its own
- Mawdu' (موضوع) — fabricated; rejected entirely
Quran or Hadith
None used in this topic.
Fresh diagram to be drawn: A grading ladder with five steps, from green at the top (Sahih) through light green (Hasan) and yellow (Muwaththaq) to orange (Da'if) and red at the bottom (Mawdu'), each step with one line explaining it and a tick or a cross.
- Scholars grade each narrator first; the Hadith takes the lowest grade in its chain.
- Sahih, Hasan, and Muwaththaq are accepted for Fiqh; Da'if needs support; Mawdu' is rejected entirely.
- One weak link weakens the whole chain; one liar destroys it.