It is narrated from a man of Banu Asad, he says: Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) came to us, and people asked him about Witr. He said: The Messenger of Allah (peace and blessings be upon him) commanded us to offer Witr at that time. Then he said: Ibn Tayyah! Say "As-salatu khayrun minan-nawm" or give the adhan or give the iqamah. In another narration, the words are: Sayyiduna Ali (may Allah be pleased with him) came out at the time when the mu’adhdhin gave the adhan for Fajr prayer including the words "As-salatu khayrun minan-nawm." Then the rest of the hadith was mentioned.