The Book of Jumu'ah (Friday Prayer)
14/44. Chapter:
Making The Two Rak'ahs After Jumu'ah Lengthy
Sunan an-Nasai
أَخْبَرَنَا عَبْدَةُ بْنُ عَبْدِ اللَّهِ، عَنْ يَزِيدَ، - وَهُوَ ابْنُ هَارُونَ - قَالَ أَنْبَأَنَا شُعْبَةُ، عَنْ أَيُّوبَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّهُ كَانَ يُصَلِّي بَعْدَ الْجُمُعَةِ رَكْعَتَيْنِ يُطِيلُ فِيهِمَا وَيَقُولُ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَفْعَلُهُ .
It was narrated from Ibn 'Umar that he used to pray two rak'ahs after Jumu'ah, making them lengthy, and he said: "The Messenger of Allah (ﷺ) used to do this."
Reference : Sunan an-Nasa'i 1429In-book reference : Book 14, Hadith 66English translation : Vol. 2, Book 14, Hadith 1430