Sahih Muslim — The Book of Faith

He who took an oath of a religion other than Islam, in the state of being a liar, would became so, as he professed. He who killed himself with a thing would be tormented on the Day of Resurrection with that very thing. One is not obliged to offer votive offering of a thing which is not in his possession.

None is obliged to give votive offering (of a thing) which is not in his possession and the cursing of a believer is tantamount to killing him, and he who killed himself with a thing in this world would be tormented with that (very thing) on the Day of Resurrection, and he who made a false claim to increase (his wealth), Allah would make no addition but that of paucity, and he who perjured would earn the wrath of God

He who took deliberately a false oath on a religion other than Islam would become that which he had professed. And he who killed himself with anything Allah would torment him with that in the Fire of Hell.

“The oath by which the Messenger of Allah used to swear was: ‘No, by the Controller of the hearts.'”

“The oath by which the Messenger of Allah used to swear was: ‘No, by the Controller of the hearts.'”

“A vow does not bring anything to the son of Adam that has not been decreed for him. It is just a means of taking wealth from the miserly.”

We went out intending (to visit) the Messenger of Allah (ﷺ) and Wa’il ibn Hujr was with us. His enemy caught him. The people desisted from swearing an oath, but I took an oath that he was my brother. So he left him. We then came to the Messenger of Allah (ﷺ), and I informed him that the people desisted from taking the oath, but I swore that he was my brother. He said: You spoke the truth: A Muslim is a brother of a Muslim.

On his father’s authority, said that his grandfather said: A woman came to the Prophet (ﷺ) and said: Messenger of Allah, I have taken a vow to play the tambourine over you. He said: Fulfil your vow. She said: And I have taken a vow to perform a sacrifice in such a such a place, a place in which people had performed sacrifices in pre-Islamic times. He asked: For an Idol? She replied: No. He asked: For an image? She replied: No. He said: Fulfil your vow.

Another chain from the Prophet (ﷺ) with similar meaning.

“I said to the Mother of the Believers: ‘Did the Messenger of Allah (ﷺ) prohibit from the meat of the sacrifice?’ She said: ‘No, but only a few people could slaughter, so he liked that they feed those who did not slaughter. (Later) we would store a leg to eat after ten days.”

(Allah (SWT) says:) “I am the opponent of three on the Day of Resurrection, and if I am someone’s opponent I will defeat him: A man who makes promises in My Name, then proves treacherous; a man who sells a free man and consumes his price; and a man who hires a worker, makes use to him, then does not give him his wages.”