Kab Ibn Mâti al-Himyarî also nicknamed as Abű Ishâq came from Yemen, from the Clan of Thee Ra-een (or the Clan of Thee al-Kila) .He lived in Yemen before he moved to Shâm (Syria). He lived during both Jahiliyyah and Islam.
Kab Ibn Mâti al-Himyarî was a prominent Rabbi and came to be known as Kab al-Ahbâr. He declared his conversion to Islam around 636 AD. He accompanied the Caliph Umar ibn al-Khattab during his conquest of Al Quds (Jerusalem) in the year 638 AD and was the Caliph Umar ibn al-Khattab's counselor and advisor on the holy sites of Al Quds (Jerusalem).
Kab Ibn Mâti al-Himyarî had a son called Ishâq.He has one narration in Muslim (Hadith) from Abű Huraira from him on the authority of al-Acmash from Abű Sâlih. Kab Ibn Mâti al-Himyarîdied during the Caliphate of Uthmân exceeding 100 years of age