Affan narrated to us, Hammad ibn Zayd narrated to us, Asim narrated to us from Zir who said: I said to Ubayy ibn Ka'b: Abu al-Mundhir, inform me about the Night of Decree. He mentioned the hadith. He said: So I said: O Abu al-Mundhir, how did you know that? He said: By the verse which the Messenger of Allah, peace and blessings be upon him, informed us of.