Seventh Imam: Abu 'l-Hasan al-Awwal MUSA al-Kazim, son of Ja`far as-Sādiq, was born in al-Abwa' (7 miles from Medina) on 7th Safar 129/746; died of poison on 25th Rajab, 183/799 in the prison of Harun ar-Rashid at Baghdad and was buried at Kazimiyyah, near Baghdad (Iraq).