Sahih al-Bukhari 7206

Arabic

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، حَدَّثَنَا حَاتِمٌ، عَنْ يَزِيدَ، قَالَ قُلْتُ لِسَلَمَةَ عَلَى أَىِّ شَىْءٍ بَايَعْتُمُ النَّبِيَّ صلى الله عليه وسلم يَوْمَ الْحُدَيْبِيَةِ قَالَ عَلَى الْمَوْتِ‏.‏

English translation

Narrated Yazid:I said to Salama, "For what did you give the Pledge of allegiance to the Prophet (ﷺ) on the Day of Hudaibiya?" He replied, "For death

Reference: Sahih al-Bukhari 7206, Book of Judgments (Ahkaam). English translation by Dr. Muhammad Muhsin Khan.