Sahih al-Bukhari 928
Sahih al-Bukhari · Book 11: Friday Prayer · To sit in between the two Khutba
Narrated `Abdullah Ibn `Umar:
حَدَّثَنَا مُسَدَّدٌ ، قَالَ حَدَّثَنَا بِشْرُ بْنُ الْمُفَضَّلِ ، قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ ، عَنْ نَافِعٍ ، عَنْ عَبْدِ اللَّهِ ، قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم يَخْطُبُ خُطْبَتَيْنِ يَقْعُدُ بَيْنَهُمَا.
The Prophet (ﷺ) used to deliver two Khutbas and sit in between them.