1. [1/371] al-Kafi: Ali b. Ibrahim from his father from Ibn Abi Umayr from Abi Ayyub from Muhammad b. Muslim who said
Abu Abdillah عليه السلام said: O Muhammad, people keep being conversed with unless they begin talking about Allah, so when you hear that then say: ‘there is no god but Allah, the Unique, the one whom there is nothing like Him’