Sahih al-Bukhari 4171
Sahih al-Bukhari · Book 64: Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi) · The Ghazwa of Al-Hudaibiya
Narrated Abu Qilaba:
حَدَّثَنَا إِسْحَاقُ ، حَدَّثَنَا يَحْيَى بْنُ صَالِحٍ ، قَالَ حَدَّثَنَا مُعَاوِيَةُ ـ هُوَ ابْنُ سَلاَّمٍ ـ عَنْ يَحْيَى ، عَنْ أَبِي قِلاَبَةَ ، أَنَّ ثَابِتَ بْنَ الضَّحَّاكِ ، أَخْبَرَهُ أَنَّهُ، بَايَعَ النَّبِيَّ صلى الله عليه وسلم تَحْتَ الشَّجَرَةِ.
that Thabit bin Ad-Dahhak had informed him that he was one of those who had given the Pledge of allegiance (of Al-Hudaibiya) beneath the Tree.