Buraidah (may Allah be pleased with him) narrates that whenever the Messenger of Allah (peace and blessings of Allah be upon him) appointed a commander over an army, he would especially advise him to fear Allah regarding his own self and to do good to the Muslims who were with him. After that, he would say: Fight in the name of Allah and in His path, fight those who disbelieve in Allah, do not embezzle from the spoils of war, do not break covenants, do not mutilate, do not kill children. And when you face your polytheist enemies, invite them to three things; whichever of them they accept, accept it from them and refrain from fighting them: Invite them to Islam and to migrate from their homeland to the land of the emigrants, and inform them that if they do so, they will have the same rights as the emigrants and the same responsibilities as the emigrants. But if they refuse to migrate, inform them that they will be like the Bedouin Muslims, and the same rulings will apply to them as apply to the Bedouin Muslims: they will have no share in the spoils of war or in the fay’ unless they fight alongside the Muslims. If they refuse to do this, then seek Allah’s help against them and begin to fight them. When you besiege a fortress and they want you to grant them protection in the name of Allah and His Prophet, do not grant them the protection of Allah and His Prophet, but grant them your own and your companions’ protection (and do not break it), for if you break your own and your companions’ protection, it is less serious than breaking the protection of Allah and His Messenger. And when you besiege the people of a fortress and they want you to refer their case to the judgment of Allah, do not refer it to the judgment of Allah, but refer it to your own judgment, for you do not know whether you will be able to reach the judgment of Allah concerning them or not.”He also said some other things in this regard __QUR_N__, __XREF_N__, __REF_N__.

Imam Tirmidhi says:
1- The hadith of Buraidah is Hasan Sahih (good and authentic),
2- In this chapter, there is also a narration from Nu’man bin Muqarrin (may Allah be pleased with him).

A similar hadith is narrated from Buraidah (may Allah be pleased with him) through this chain as well. In it, there is this addition: «فإن أبوا فخذ منهم الجزية فإن أبوا فاستعن بالله عليهم» that is, "If they refuse to accept Islam, then take jizyah from them. Then if they also refuse to pay jizyah, seek Allah's help to gain victory over them." Waki‘ and several others have narrated from Sufyan in this manner, and except for Muhammad ibn Bashshar, others have narrated from ‘Abd al-Rahman ibn Mahdi, and in it the command regarding jizyah is mentioned.

Anas (may Allah be pleased with him) says that the Prophet Muhammad (peace and blessings be upon him) used to attack at the time of Fajr prayer. If he heard the call to prayer, he would stop, otherwise he would attack. One day he listened carefully and heard a man saying: «الله أكبر الله أكبر» . The Prophet said: "He is upon the natural religion (Islam)." When the man said «أشهد أن لا إله إلا الله» , the Prophet said: "You have been saved from the Hellfire." Hasan says: Abu Al-Walid narrated to us, he said: Hammad bin Salamah narrated to us with this same chain and in a similar manner. Imam Tirmidhi says:
This hadith is Hasan Sahih.