Salim narrated on the authority of his father that the Messenger of Allah (ﷺ) used to observe two rak'ahs after Jumu'a.
Sahih Muslim Book 7, Hadith 91
← Previous Hadith 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 Book 7, Hadith 90 Next Hadith → Yes, I observed the Jumu`a prayer along with him in Maqsura and when the Imam pronounced salutation I stood up at my place and observed (Sunan rak`ahs). As he entered (the apartment) he sent for me and said: Do not repeat what you have done. Whenever you have observed the Jumu`a prayer, do not observe (Sunan prayer) till you, have talked or gone out, for the Messenger of Allah (ﷺ) had ordered us to do this and not to combine two (types of) prayers without talking or going out.

Sahih Muslim Book 7, Hadith 92