Mukhtasar Muslim

Sayyiduna Abu Musa Ash'ari (may Allah be pleased with him) says: I came to the Messenger of Allah (peace and blessings be upon him) along with some Ash'aris to ask him for mounts. The Messenger of Allah (peace and blessings be upon him) said, "By Allah, I will not give you mounts, and I do not have any mounts to give you." Then we stayed there for as long as Allah willed. After that, some camels came to the Messenger of Allah (peace and blessings be upon him), so he ordered that three white-humped camels be given to us. When we left, we or some of us said, "May Allah not bless us, for we came to the Messenger of Allah (peace and blessings be upon him) and asked for mounts, and he swore that we would not get mounts, but then he gave us mounts." Then people came to the Messenger of Allah (peace and blessings be upon him) and told him, so he said, "I did not mount you, but Allah mounted you. And if I ever swear an oath and then see something better than it, I will offer expiation for my oath and do what is better."