Sahih al-Bukhari 930
Sahih al-Bukhari · Book 11: Friday Prayer · During the Khutba, two Rak'a Salat before sitting (Tahayyat-ul-Masjid)
Narrated Jabir bin `Abdullah:
حَدَّثَنَا أَبُو النُّعْمَانِ ، قَالَ حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ ، عَنْ عَمْرِو بْنِ دِينَارٍ ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ ، قَالَ جَاءَ رَجُلٌ وَالنَّبِيُّ صلى الله عليه وسلم يَخْطُبُ النَّاسَ يَوْمَ الْجُمُعَةِ فَقَالَ " أَصَلَّيْتَ يَا فُلاَنُ ". قَالَ لاَ. قَالَ " قُمْ فَارْكَعْ " .
A person entered the mosque while the Prophet (ﷺ) was delivering the Khutba on a Friday. The Prophet (ﷺ) said to him, "Have you prayed?" The man replied in the negative. The Prophet (ﷺ) said, "Get up and pray two rak`at."