Nasai

´It was narrated that Abu Musa Al-Ash'ari said:` "I came to the Messenger of Allah with a group of the Ash'ari people and asked him to give us animals to ride. He said: 'By Allah, I cannot give you anything to ride and I have nothing to give you to ride.' We stayed as long as Allah willed, then some camels were brought to him. He ordered that we be given three fine-looking camels. When we left, we said to one another: 'We came to the Messenger of Allah to ask him for animals to ride, and he swore by Allah that he would not give us anything to ride, then he gave us something.'" Abu Musa said: "We came to the Prophet and told him about that. He said: 'I did not give you animals to ride, rather Allah gave you them to ride. By Allah, I do not swear an oath and then see something better than it, but I offer expiation for my oath and do that which is better.'"

´'Amr bin Shu'aib narrated from his father, from his grandfather, that the Messenger of Allah said:` "Whoever swears an oath, then sees something better than it, let him do that which is better."

´It was narrated from 'Abdur-Rahman bin Samurah that the Messenger of Allah said:` "If any one of you swears an oath, then he sees something better than it, let him offer expiation for his oath, and look at what is better and do it."

´'Abdur-Rahman bin Samurah said:` "The Messenger of Allah said: 'If you swear an oath, offer expiation for your oath, then do that which is better.'"

´It was narrated from 'Abdur-Rahman bin Samurah that the Prophet said:` "If you swear an oath, then you see something better than it, then offer expiation for your oath, and do that which is better."