Nafi' said:

Ibn 'Umar saw a man praying two rak'ahs after the Friday prayer on the same place (where he offered the Friday prayer). He pushed him and said: Do you offer four rak'ahs of Friday prayer ? 'Abd Allah (b. 'Umar) used to pray two rak'ahs in his house after the Friday prayer, and he used to say: This is how the Messenger of Allah ﷺ did.

حَدَّثَنَا مُحَمَّدُ بْنُ عُبَيْدٍ، وَسُلَيْمَانُ بْنُ دَاوُدَ، - الْمَعْنَى - قَالاَ حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، حَدَّثَنَا أَيُّوبُ، عَنْ نَافِعٍ، أَنَّ ابْنَ عُمَرَ، رَأَى رَجُلاً يُصَلِّي رَكْعَتَيْنِ يَوْمَ الْجُمُعَةِ فِي مَقَامِهِ فَدَفَعَهُ وَقَالَ أَتُصَلِّي الْجُمُعَةَ أَرْبَعًا وَكَانَ عَبْدُ اللَّهِ يُصَلِّي يَوْمَ الْجُمُعَةِ رَكْعَتَيْنِ فِي بَيْتِهِ وَيَقُولُ هَكَذَا فَعَلَ رَسُولُ اللَّهِ ﷺ .