1202
Musnad AhmedIt was narrated that "Asim bin Damrah said:
Some of the companions of "Ali (رضي الله عنه) said: Why don"t you tell us about the voluntary prayers that the Messenger of Allah (ﷺ) offered during the day? "Ali (رضي الله عنه) said: By Allah, you cannot do it. They said to him; Tell us about it and we will take whatever we are able to do... then he quoted the hadeeth at length.
Reference: Musnad Ahmad 1202
Arabic/English book : Book 5, Hadith 1202
Arabic/English book : Book 5, Hadith 1202