Noun
isnad (plural isnads)
(Islam) a Muslim tradition, specifying the chain of human reporters from the time of Muhammad that authenticates the legitimacy of a hadith (a report of sayings and acts of the prophet)
Each hadith consists of two parts, the isnad (Arabic: 'support'), or the chain of transmitters through which a scholar traced the matn, or text, of a hadith back to the Prophet. Source: Internet
The isnad provided by Ibn Ishaq reads: Ibn Mumayd-Salamah-Muhammad Ibn Ishaq-Yazid bin Ziyad al-Madani-Muhammad bin Ka’b al-Qurazi. Source: Internet
The isnad consists of a chronological list of the narrators, each mentioning the one from whom they heard the hadith, until mentioning the originator of the matn along with the matn itself. Source: Internet