JA’FARU SADIQ جعفر الصادق
Abu ‘Abdi’llah Ja’far ibn Muhammad ibn ‘Ali ibn al-Husain ibn ‘Ali ibn Abi Talib, was one of the twelve persons who, according to the Shi’ahs, are considered the rightful Imams [SHI’AH]. He was surnamed as-Sadiq, “The Veracious,” on account of his uprightness of character. He was a learned man, and his pupil, Abu Musa, is said to have composed a work of two thousand pages containing the problems of his master Ja’faru ‘s-Sadiq. Ja’far was born A.H. 80, and died A.H. 148, and was buried in the cemetery al-Baki’ at al-Madinah.

Based on Hughes, Dictionary of Islam