Sayyiduna Buraidah (may Allah be pleased with him) narrates that whenever the Messenger of Allah (peace and blessings be upon him) appointed someone as commander over an army or a detachment (a detachment is called a small group, and some have said that a detachment consists of four horsemen who go secretly at night), he would especially instruct him to fear Allah Almighty and to treat the Muslims who were with him well. Then he would say: Fight in the name of Allah and in His path. Fight those who do not believe in Allah, and do not commit theft from the spoils (i.e., do not steal from the war booty), do not break treaties, do not mutilate (i.e., do not cut off hands, feet, nose, or ears), and do not kill children (who are minors and not fit for fighting). And when you meet your enemy from among the polytheists, invite them to three things. If they accept any of these three, accept it from them and refrain from fighting and looting them. First, invite them to Islam (this is one of the three things). If they accept, accept it from them and refrain from fighting them. Then invite them to leave their land and come to the land of the emigrant Muslims, and tell them that if they do so, they will have what the emigrants have and will be subject to what the emigrants are subject to (i.e., they will be like the emigrants in both benefit and loss). If they do not wish to leave their land, then tell them that they will be like the Bedouin Muslims, and the command of Allah that applies to Muslims will also apply to them, but they will not have any share in the spoils of war or the wealth obtained through peace, except if they fight alongside the Muslims (against the disbelievers). If they refuse to accept Islam, then ask them for jizyah (tribute tax). If they agree to pay jizyah, accept it from them and refrain from fighting them. If they do not agree to pay jizyah, then seek help from Allah and fight them. And when you besiege the people of a fortress and they ask you for the protection of Allah or His Messenger, do not grant them the protection of Allah or His Messenger, but grant them your own and your companions’ protection. For if your own or your companions’ protection is violated, it is better than the protection of Allah and His Messenger being violated. And when you besiege the people of a fortress and they want you to bring them out according to the command of Allah Almighty, do not bring them out according to the command of Allah, but bring them out according to your own command. For you do not know whether you will be able to carry out the command of Allah or not. Abdur Rahman bin Mahdi (the narrator of the hadith) said: He said this, or something similar in meaning.

It is narrated from Sayyiduna Abu Musa (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) sent him and Sayyiduna Mu'adh (may Allah be pleased with him) towards Yemen, and said: Make things easy and do not make them difficult and harsh, and give glad tidings and do not make people averse, and work together in agreement and do not create discord.

It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) sent a messenger to Banu Lihyan and said: "From every household, one of every two men should go forth." Then he said to those who remained at home: "Whoever looks after the family and wealth of the one who goes out, he will receive half the reward of the Mujahid."

Sayyiduna Ibn Umar (may Allah be pleased with them both) says: I presented myself before the Messenger of Allah (peace and blessings be upon him) on the day of Uhud, and I was fourteen years old, but he did not accept me (i.e., did not include me among those who would fight). Then I presented myself on the day of Khandaq when I was fifteen years old, and he accepted me. Nafi’ said: I narrated this hadith to Sayyiduna Umar bin Abdul Aziz when he was the caliph, so he said: This is the limit between a minor and an adult, and he wrote to his governors that whoever is fifteen years old should be given a share, and whoever is less than fifteen should be included among the children and dependents.

`Sayyiduna Ibn Umar (may Allah be pleased with them) narrates from the Noble Prophet (peace and blessings of Allah be upon him) that the Messenger of Allah (peace and blessings of Allah be upon him) forbade traveling towards the enemy's land carrying the Qur'an, out of fear that it might fall into the hands of the enemy (and they might disrespect it).

Abu Huraira (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings of Allah be upon him) said: When you travel during the days of pasture and water (that is, in good weather, when animals have plenty of water and fodder), let the camels take their share from the earth. And when you travel during drought, then move quickly with them (so that you may quickly pass through the drought-stricken land). And when you camp at night, avoid the road (that is, set up camp away from the path), because at night the road is the dwelling place of insects and vermin.

Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Travel is a portion of torment; it prevents one of you (i.e., the traveler) from sleep and food and drink (i.e., these things are not obtained on time and often there is hardship). So when one of you has completed his work during travel, let him return quickly to his home."

`Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) forbade coming to one's house at night with the intention of catching the household in theft or betrayal, or to look for their faults (because this involves suspicion, which is prohibited in Shariah; secondly, it causes distress to the woman and leads to many other harms; thirdly, God forbid, if something happens, there is fear for one's own life).

It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) would not return home at night from a journey, but would arrive in the morning or evening (so that the woman would have the opportunity to adorn herself).

Ibn Aun says: I asked Nafi‘ whether it is necessary to invite the disbelievers to Islam before fighting them? He replied in writing that this command was in the early days of Islam (when the disbelievers had not yet received the invitation to Islam), and the Messenger of Allah (peace and blessings be upon him) attacked Banu Mustaliq while they were unaware and their animals were drinking water. The Prophet (peace and blessings be upon him) killed those among them who fought and took the rest captive, and on that day, Umm al-Mu’minin Juwayriya bint al-Harith (may Allah be pleased with her) was captured. Nafi‘ said that this hadith was narrated to me by Sayyiduna ‘Abdullah ibn ‘Umar (may Allah be pleased with them both), and he was part of that army.