صحيح مسلم
Sahih Muslim
كتاب الإمارة
The Book on Government
باب اسْتِحْبَابِ مُبَايَعَةِ الإِمَامِ الْجَيْشَ عِنْدَ إِرَادَةِ الْقِتَالِ وَبَيَانِ بَيْعَةِ الرِّضْوَانِ تَحْتَ الشَّجَرَةِ:
Chapter: It is recommended for the army to swear allegiance to the ruler when intending to fight, and an account of Bay'at Ar-Ridwan beneath the tree
Hadith 1859
This hadith is listed as number 4820 in Maktaba Shamila
وحَدَّثَنِيهِ مُحَمَّدُ بْنُ رَافِعٍ ، حَدَّثَنَا أَبُو أَحْمَدَ ، قَالَ : وَقَرَأْتُهُ عَلَى نَصْرِ بْنِ عَلِيٍّ ، عَنْ أَبِي أَحْمَدَ ، حَدَّثَنَا سُفْيَانُ ، عَنْ طَارِقِ بْنِ عَبْدِ الرَّحْمَنِ ، عَنْ سَعِيدِ بْنِ الْمُسَيِّبِ ، عَنْ أَبِيهِ : " أَنَّهُمْ كَانُوا عِنْدَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَامَ الشَّجَرَةِ ، قَالَ : فَنَسُوهَا مِنَ الْعَامِ الْمُقْبِلِ " .
It has also been narrated on the authority of Sa'id bin Musayyib who learnt from his father that they were with the Messenger of Allah (ﷺ) in the year of the Tree (i. e. in the year of the fealty of God's pleasure sworn under the tree at Hudaibiya), but next year they forgot the spot of the tree.
