It is narrated from Hazrat Abu Musa (may Allah be pleased with him) that once I, along with a group of Ash'aris, presented ourselves before the Prophet Muhammad (peace and blessings be upon him). We requested animals for riding from the Prophet (peace and blessings be upon him), so the Prophet (peace and blessings be upon him) said, "By Allah! I cannot provide you with mounts because I do not have anything to mount you on." We waited for a while, "as long as Allah willed," then the Prophet (peace and blessings be upon him) ordered for three camels with bright foreheads for us. When we were about to leave, one of us said to the other, "We had come to the Prophet (peace and blessings be upon him) to request riding animals, and the Prophet (peace and blessings be upon him) had sworn that he would not give us riding animals. Let us go back and remind the Prophet (peace and blessings be upon him) of his oath." So we again presented ourselves before the Prophet (peace and blessings be upon him) and said, "O Messenger of Allah (peace and blessings be upon him)! We had come to you to request riding animals, and you had sworn that you would not give us riding animals, yet you gave us animals?" The Prophet (peace and blessings be upon him) said, "I did not provide you with mounts, rather Allah Almighty did. By Allah! If Allah wills, whenever I take an oath and see something better in another thing, I will choose that and offer expiation for my oath."