Sahih al-Bukhari 3999
Book 64: Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi) · Narrated by 'Ubada bin As-Samit
Arabic
حَدَّثَنَا أَبُو الْيَمَانِ، أَخْبَرَنَا شُعَيْبٌ، عَنِ الزُّهْرِيِّ، قَالَ أَخْبَرَنِي أَبُو إِدْرِيسَ، عَائِذُ اللَّهِ بْنُ عَبْدِ اللَّهِ أَنَّ عُبَادَةَ بْنَ الصَّامِتِ، وَكَانَ، شَهِدَ بَدْرًا أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " بَايِعُونِي ".
English translation
Narrated 'Ubada bin As-Samit:(who was one of the Badr warriors) Allah's Messenger (ﷺ) said, "Give me the pledge of allegiance
Reference: Sahih al-Bukhari 3999, Book of Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi). English translation by Dr. Muhammad Muhsin Khan.