Sulaiman b. Buraida told on his father’s authority that when Allah's Messenger ﷺ appointed a commander over an army or a detachment he instructed him to fear Allah himself and consider the welfare of the Muslims who were with him. He then said, “Go forth in Allah’s name in Allah’s path and fight with those who disbelieve in Allah. Go forth and do not be unfaithful regarding booty, or treacherous, or mutilate anyone, or kill a child. When you meet the polytheists who are your enemy summon them to three things, and accept whichever of them they are willing to agree to, and refrain from them. Then* summon them to Islam, and if they agree accept it from them and refrain from them. Then summon them to leave their abodes and transfer to the abode of the Emigrants, and tell them that if they do so they will have the same rights and responsibilities as the Emigrants; but if they refuse to transfer from them tell them they will be like the desert Arabs who are Muslims, subject to Allah’s jurisdiction which applies to the believers, but will have no spoil or booty unless they strive with the Muslims. If they refuse demand the jizya from them, and if they agree accept it from them and refrain from them; but if they refuse seek Allah’s help and fight with them. When you invest a fortress and its people wish you to grant them the protection of Allah and His prophet, grant them neither but grant them your protection and that of your companions, for it is less serious to break your guarantee of protection and that of your companions than to break that of Allah and His Messenger. If you invest a fortress and its people offer to capitulate and have the matter referred to Allah’s jurisdiction, do not grant this, but let them capitulate and have the matter referred to your jurisdiction, for you do not know whether or not you will hit on Allah’s jurisdiction regarding them.” * What follows gives in detail the three things mentioned above. Muslim transmitted it.