Chapter 8: The Book of Prayer - Friday
' Abdullah b. 'Umar, while describing the Nafl prayer of the Messenger of Allah (ﷺ), said: He did not observe (Nafl) prayer after Jumu' a till he went back and observed two rak' ahs in his house. Yahya said: I guess that I uttered these words (before Imam Malik) that he of course observed (them).
Sahih Muslim 882b