Book 78: Oaths and Vows
Volume 8, Book 78, Number 618: Narrated 'Aisha: Abu Bakr As-Siddiq had never broken his oaths till Allah revealed the expiation for the oaths. Then he said, "If I take an oath to do something and later on I find something else better than the first one, then I do what is better and make expiation for my oath." Volume 8, Book 78, Number 619: Narrated 'Abdur-Rahman bin Samura: The Prophet said, "O 'Abdur-Rahman bin Samura! Do not seek to be a ruler, because if you are given authority for it, then you will be held responsible for it, but if you are given it without asking for it, then you will be helped in it (by Allah): and whenever you take an oath to do something and later you find that something else is better than the first, then do the better one and make expiation for your oath." Volume 8, Book 78, Number 620: Narrated Abu Musa: I went to the Prophet along with a group of Al-Ash'ariyin in order to request him to provide