(164) باب مَا يُكْرَهُ مِنَ التَّنَازُعِ وَالاِخْتِلاَفِ فِي الْحَرْبِ وَعُقُوبَةِ مَنْ عَصَى إِمَامَهُ
Narrated Abu Burda:
That his father said, "The Prophet (ﷺ) sent Mu`adh and Abu Musa to Yemen telling them. 'Treat the people with ease and don't be hard on them; give them glad tidings and don't fill them with aversion; and love each other, and don't differ."
Reference: Sahih al-Bukhari 3038
In-book reference: Book 56, Hadith 244
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 52, Hadith 275