It was narrated from Salim, from his father, that the Prophet (ﷺ) used to pray two Rak’ah after Jumu’ah.
Sunan Ibn Majah Book 5, Hadith 329
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Sunan Ibn Majah Book 5, Hadith 328 Next Hadith → “The Messenger of Allah (ﷺ) said: ‘If you pray after Friday, then pray four (Rak’ah).’”

Sunan Ibn Majah Book 5, Hadith 330