Sunan an-Nasa'i, Volume 2, Book 14, Hadith 1428 (DarusSalam) ⓘ
It was narrated from Ibn 'Umar that: The Messenger of Allah would not pray after jumu'ah until he had left, then he would pray two rak'ahs. (SAhih)
أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ لاَ يُصَلِّي بَعْدَ الْجُمُعَةِ حَتَّى يَنْصَرِفَ فَيُصَلِّيَ رَكْعَتَيْنِ .
also referenced under: Book 14, Hadith 1438 (In-Book)