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 ‏.‏

It was narrated from Ibn 'Umar that: The Messenger of Allah (PBUH) would not pray after jumu'ah until he had left, then he would pray two rak'ahs. (SAhih) Translation Not Available

Book reference: Sunan An Nisai Book 14 Hadith 1428
Web reference: Sunan An Nisai Volume 2 Book 14 Hadith 1428