Musnad Ahmad Hadith 19749

It is narrated from Abu Musa Ash'ari (may Allah be pleased with him) that we presented ourselves before the Noble Prophet (ﷺ). We requested animals for riding from the Noble Prophet (ﷺ), so the Noble Prophet (ﷺ) said, "By Allah! I cannot mount you, for I have nothing to mount you on." We waited for a while, "as long as Allah willed," then the Noble Prophet (ﷺ) ordered for three camels with bright foreheads for us. When we were about to return, one of us said to the other, "We had come to the Noble Prophet (ﷺ) with a request for riding animals, and the Noble Prophet (ﷺ) had sworn that he would not give us riding animals. Let us go back so that we may remind the Noble Prophet (ﷺ) of his oath." So we again presented ourselves before the Noble Prophet (ﷺ) and said, "O Messenger of Allah (ﷺ), we had come to you with a request for riding animals, and you had sworn that you would not give us riding animals, yet you gave us animals?" The Noble Prophet (ﷺ) said, "I did not mount you, 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."