861
Musnad AhmedIt was narrated that a man from [the tribe of] Banu Asad said:
"Ali (رضي الله عنه) came out to us when the mu"adhdhin gave the call to Fajr prayer and said: The Messenger of Allah (ﷺ) has enjoined us to pray Witr and this is the time for it. Then he said: Give the iqamah for prayer, O Ibnun-Nawwahah.
Reference: Musnad Ahmad 861
Arabic/English book : Book 5, Hadith 861
Arabic/English book : Book 5, Hadith 861