Concerning Oaths and Vows
It is related from Ibn ʿOmar that he said, 'The oath which the Prophet used to use most was, "No, by the Turner of hearts!"'—Al Bukhárí.
It is related from Ibn ʿOmar that, 'The Apostle of God said, " Verily God has forbidden you to swear by your fathers, Whoever takes an oath, let him swear by God, or remain silent."'—Muslim, Al Bukhárí.
It is related from ʿImrán bin Ḥuṣain that, 'The Apostle of God said, "There is no performance of a vow requiring disobedience, or regarding anything which the servant does not own."'—Muslim.
It is related from Ibn ʿAbbás that he said, 'Whilst the Prophet was making an address, behold! a man remained standing, and he asked about him. They replied, "He is Abu Isráʾil. He has vowed to stand, and to neither sit, nor go into the shade nor speak. And he has vowed to fast, and he is is fasting." The Prophet said, "Order him to speak and go into the shade and sit down and end his fast."'—Al Bukhárí.
It is related from Jábir bin ʿAbduʾlláh that 'A man stood up on the day of the conquest of Mecca and said, "O Apostle of God, verily I have vowed to God, the Exalted and Magnified, that if He gave thee conquest over Mecca, I would pray in two rakʿahs in Jerusalem." The Prophet replied, "Pray here." Then the man repeated what he had said. He replied, "Pray here." Then the man repeated his words. The Prophet said, "Go your own way then!"'—Abú Dáud, Al Dárimi.
It is related from ʿAbduʾlláh bin Málik that, 'ʿUqbah bin ʿÁmir asked the Prophet about his sister who had vowed to perform the pilgrimage barefooted and unveiled. The Prophet said, "Order her to veil herself and ride, and to fast three days."'—Abú Dáud, At Tirmidhí, An Nasái, Ibn Májah.
It is related from Muḥammad binuʾl-Muntashir that he said, 'Verily a man made a vow that if God saved him from his enemies, he would sacrifice himself. So he asked Ibn ʿAbbás about it. The latter said to him, "Ask Masrúq." So he asked him. He replied, " Do not sacrifice thyself, for if thou art a believer, then thou wilt kill a believer; and if thou art an infidel, that will hasten thee to the fire. Therefore buy a ram
