Abdur-Razzaq عبد الرزاق بن همام · Oaths and Vows (Kitab Al-Aiman Wa Al-Nudhur)

The Prophet (ﷺ) said: One should not take a false oath at this pulpit of mine even on a green tooth-stick; otherwise he will make his abode in Hell, or Hell will be certain for him.

The Messenger of Allah (ﷺ) found 'Umar al-Khattab in a caravan while he was swearing by his father. So he said: Allah forbids you to swear by forefathers. If anyone swears, he must swear by Allah or keep silence.

AbuBakr adjured the Prophet (ﷺ). The Prophet (ﷺ) said: Do not adjure an oath.

Uqbah consulted the Prophet (ﷺ) about his sister who took a vow to perform hajj barefooted and bareheaded. So he said: Command her to cover her head and to ride, and to fast three days.

The tradition about the sister of 'Uqbah b. 'Amir as narrated by Hisham, but he made no mention of the sacrificial animal. In his version he said: Ask your sister to ride. Abu Dawud said: Khalid narrated it from 'Ikrimah to the same effect as narrated by Hisham.

Ka'b ibn Malik said to AbuLubabah; or someone else whom Allah wished; or to the Prophet (ﷺ): To make my repentance complete I should depart from the house of my people in which I fell into sin, and that I should divest myself of all my property as sadaqah (alms). He said: A third (of your property) will be sufficient for you.