"There is no vow except for what is sought thereby for the sake of God." Narrated by Abu Dawud (21). He also said: "Whoever vows to disobey God, let him not disobey Him," and he did not order an expiation. When the woman who was with the disbelievers made a vow—and she was saved on the she-camel of the Messenger of God (peace and blessings of God be upon him)—to slaughter it, she said: "O Messenger of God, I vowed that if God saved me on it, I would slaughter it." He said: "How evil is what you have repaid it with! There is no vow in disobedience to God, nor in what the servant does not own." Narrated by Muslim, and he did not order her to offer an expiation. He said to Abu Isra'il, when he vowed to stand in the sun, not to sit, not to seek shade, and not to speak: "Command him to speak, to sit, to seek shade, and to complete his fast." Narrated by al-Bukhari (22), and he did not order him to offer an expiation. Furthermore, a vow is a commitment to obedience, and this is a commitment to disobedience. Moreover, it is an invalid vow, so it necessitates nothing, like an invalid oath. The evidence for the first view is what Aisha narrated, that the Messenger of God (peace and blessings of God be upon him) said: "There is no vow in disobedience, and its expiation is the expiation of an oath." Narrated by Imam Ahmad in his Musnad and Abu Dawud in his Sunan, and al-Tirmidhi said: It is a gharib (strange) hadith (24). From Abu Hurayrah and Imran ibn Husayn, [from the Prophet (peace and blessings of God be upon him) the same: Al-Jawzjani narrated with his chain of transmission from Imran ibn Husayn] (25), who said: I heard the Messenger of God (peace and blessings of God be upon him) say: "Vows are of two types: whatever is a vow in the obedience of God, that is for God, and in it there is the fulfillment; and whatever is a vow in the disobedience of God, there is no fulfillment in it, and he shall expiate it with what one expiates an oath."
= and Muslim in: The Chapter of clarifying the severity of the prohibition of killing a human being..., from the Book of Oaths. Sahih Muslim 1/104. It was also narrated by al-Tirmidhi in: The Chapter of what has been narrated regarding 'There is no vow in what the son of Adam does not own', from the Chapters on Vows; and in: The Chapter of what has been narrated concerning one who accuses his brother of disbelief, from the Chapters on Oaths. 'Aridat al-Ahwadhi 7/6, 10/103; al-Nasa'i in: The Chapter on the vow regarding what one does not own, from the Book of Oaths and Vows. Al-Mujtaba 7/18; and Imam Ahmad in: Al-Musnad 4/33. (21) In: The Chapter on divorce before marriage, from the Book of Divorce. Sunan Abi Dawud 1/507. It was also narrated by Imam Ahmad in: Al-Musnad 2/185. (22) Its documentation has been provided previously on 4/482. (23) The 'waw' was dropped from [M]. (24) Its documentation has been provided previously on page 477. (25) Dropped from [B]. Refer to: For the hadith of Abu Hurayrah, see: Talkhis al-Habir 4/175. As for the hadith of Imran ibn Husayn which al-Jawzjani narrated, it was narrated by al-Nasa'i in: The Chapter on the expiation of a vow, from the Book of Oaths and Vows. Al-Mujtaba 7/25-27; al-Hakim in: The Book of Vows. Al-Mustadrak 4/305; al-Bayhaqi in: The Chapter on one who makes an expiation of an oath in it, from the Book of Oaths. Al-Sunan al-Kubra 10/70; Ibn 'Adi in: Al-Kamil 6/2209; Abu Nu'aym in: Hilyat al-Awliya' 7/97; and al-Khatib in: Tarikh Baghdad 6/292, 293.