Muhammad b. Ibrahim b. Ishaq al-Talaqani narrated to us. He said: Ahmad b. Muhammad b. Sa`id al-Hamadani the servant of Bani Hashim narrated to us. He said: Al-Mundhir b. Muhammad informed us. He said: Ja`far b. Isma`il al-Bazzaz al-Kufi narrated to me. He said: `Abdullah b. al-Fadl narrated to me from Thabit b. Dinar from Sa`id b. Jubayr from `Abdullah b. `Abbas. He said:

The Messenger of Allah (s) said: He who denies the Imamate of `Ali after me is like him who denies my prophethood in my lifetime; and he who denies my prophethood is like him who denies the lordship of his Lord.