By Allah, Allah Willing, if I ever take an oath and then see that another option is better…

Abu Mūsa al-Ash‘ari (may Allah be pleased with him) informs that he went to the Messenger of Allah (may Allah's peace and blessings be upon him) along with a group of people from his tribe. They aimed to ask the Prophet (may Allah's peace and blessings be upon him) to give them camels to ride so that they could take part in Jihad. He (may Allah's peace and blessings be upon him) swore that he would not provide them with mounts and that he did not have any to give them. They went back and stayed for a period of time. Then, three camels were brought to the Prophet (may Allah's peace and blessings be upon him), who sent them to them. They said to one another: Allah will not bless these camels for us, for the Prophet (may Allah's peace and blessings be upon him) swore that he would not provide us with mounts. So, they went and asked him about this issue. Thereupon, the Prophet (may Allah's peace and blessings be upon him) said: Allah Almighty is the One Who has provided you with mounts, for He has granted help and sustenance. I am only a means through which this has come to pass. Then, he (may Allah's peace and blessings be upon him) said: By Allah, Allah Willing, I do not take an oath to do or abandon something and then see that another choice is better and preferable except that I choose to do what is better, aleave the thing upon which I swore, and make expiation for my oath.