Hadith 113

Sahih Muslim

Book 33: The Book on Government

Chapter 18

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

باب اسْتِحْبَابِ مُبَايَعَةِ الإِمَامِ الْجَيْشَ عِنْدَ إِرَادَةِ الْقِتَالِ وَبَيَانِ بَيْعَةِ الرِّضْوَانِ تَحْتَ الشَّجَرَةِ

Sahih Muslim 1857b
وَحَدَّثَنَا ابْنُ الْمُثَنَّى، حَدَّثَنَا أَبُو دَاوُدَ، ح وَحَدَّثَنَاهُ إِسْحَاقُ بْنُ إِبْرَاهِيمَ، أَخْبَرَنَا النَّضْرُ بْنُ شُمَيْلٍ، جَمِيعًا عَنْ شُعْبَةَ، بِهَذَا الإِسْنَادِ مِثْلَهُ ‏.‏
The same tradition has been handed down through a different chain of transmitters.