Sahih al-Bukhari, Book 64, Hadith 213 (In-Book) ⓘ
Narrated Abu Qilaba: 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.
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.
also referenced under: Hadith 4171 (DarusSalam) & Volume 5, Book 59, Hadith 489 (USC-MSA)