(18) باب اسْتِحْبَابِ مُبَايَعَةِ الإِمَامِ الْجَيْشَ عِنْدَ إِرَادَةِ الْقِتَالِ وَبَيَانِ بَيْعَةِ الرِّضْوَانِ تَحْتَ الشَّجَرَةِ
It has been narrated on the authority of Yazid b. Abu Ubaid (the freed slave of Salama b. al-Akwa') who said:
1 asked Salama as to what effect he had sworn fealty to the Messenger of Allah (ﷺ) on the Day of Hudaibiya. He said: To the effect that we will die fighting.
Reference: Sahih Muslim 1860 a
In-book reference: Book 33, Hadith 118
USC-MSA web (English) reference(deprecated numbering scheme): Book 20, Hadith 4590