Muḥammad b. ʿAlī b. Mūsā known as Imām al-Jawād (a) was the ninth Imam of Twelver Shia, his kunya was Abu Ja’far and he is mentioned in Hadith sources as Abu Ja’far al-Thani (the second Abu Ja’far). He (a) was born on Rajab 10, 195/April 8, 811 in Medina and was Imam for 17 years. He was martyred when he (a) was 25 years old and was buried in Kadhimiya beside the grave of his grandfather Musa b. Ja’far (a). He was the youngest Imam when he was martyred.