Abdullah bin Umar (may Allah be pleased with them both) narrated that when the Prophet Muhammad (peace and blessings be upon him) attacked Banu al-Mustaliq, they were completely unaware and their cattle were drinking water. Their fighting men were killed, and the women and children were taken captive. Among those captives was Juwayriya (may Allah be pleased with her) (the Mother of the Believers). Abdullah bin Umar (may Allah be pleased with them both) himself was also with the Muslim army.

Hazrat Saeed bin Abi Burdah narrates from his father that the Noble Prophet (peace and blessings be upon him) sent his grandfather Hazrat Abu Musa (may Allah be pleased with him) and Hazrat Mu'adh bin Jabal (may Allah be pleased with him) as governors to Yemen and said: Make things easy for the people, do not put them in difficulties. Give people glad tidings, do not make them averse to the religion, and both of you should be in agreement with each other.

Hazrat Anas bin Malik (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: Make things easy and do not make them difficult, and give glad tidings and do not cause aversion.

Narrated Ibn Umar (may Allah be pleased with them): The Messenger of Allah (peace and blessings be upon him) said: For every betrayer, a flag will be raised on the Day of Resurrection, and it will be announced that this is the sign of the treachery of so-and-so, son of so-and-so.

Hazrat Anas bin Malik (may Allah be pleased with him) narrated that the Holy Prophet (peace and blessings of Allah be upon him) said: On the Day of Resurrection, there will be a flag for every deceitful person; that flag will be fixed (behind him), and by it he will be recognized.

Narrated Jabir bin Abdullah (may Allah be pleased with him): The Prophet (peace and blessings of Allah be upon him) said, "War is a deception."

Hazrat Abu Huraira (may Allah be pleased with him) narrated that the Noble Prophet (peace and blessings be upon him) said: "What is fighting? It is a strategy."

Hazrat Abu Huraira (may Allah be pleased with him) narrated that the Messenger of Allah (peace and blessings be upon him) said: Do not wish to encounter the enemy, but if fighting does begin, then be steadfast.

When Hazrat Umar bin Ubaidullah (may Allah be pleased with him) set out towards Haruriyyah to fight the Khawarij, he received a letter from Abdullah bin Abi Awfa (may Allah be pleased with him). In it, he had written that the Messenger of Allah (peace and blessings be upon him) waited during a battle, and then when the sun had declined, he (peace and blessings be upon him) addressed the people, saying: O people! Do not wish to meet the enemy in battle, but rather ask Allah for safety. However, when battle becomes inevitable, then be patient and stand firm, and know that Paradise is under the shade of swords. Then he (peace and blessings be upon him) supplicated thus: O Allah! Revealer of the Book (Qur'an), O Mover of the clouds! O Defeater of the confederates (i.e., the groups of disbelievers at the Battle of the Trench)! Defeat our enemy and help us against them.

Hazrat Abdullah bin Umar (may Allah be pleased with them both) narrated that during one of the battles of the Prophet (the Battle of Conquest), a woman was found killed, so the Prophet (peace and blessings be upon him) expressed disapproval regarding the killing of women and children.