Hadith 1258
1258 - حَدَّثَنَا الْحُمَيْدِيُّ قَالَ: ثنا سُفْيَانُ، قَالَ: ثنا حَسَّانُ بْنُ جَعْدَةَ، قَالَ: «رَأَيْتُ الْحَسَنَ بْنَ أَبِي الْحَسَنِ دَخَلَ مَسْجِدَ وَاسِطَ يَوْمَ الْجُمُعَةِ وَابْنُ هُبَيْرَةَ يَخْطُبُ عَلَي الْمِنْبَرِ، فَصَلَّي رَكْعَتَيْنِ فَجَلَسَ»
The narrator named Hassan says: I saw Hasan bin Abu al-Hasan entering the "Wasit Mosque" on Friday while Ibn Hubayrah was delivering the sermon on the pulpit, so he first performed two rak'ahs and then sat down.