Sunan Abi Dawud 3273
سنن أبي داود#3273HasanNarrated Abdullah ibn Amr ibn al-'As: The Messenger of Allah (ﷺ) said: A vow is binding in those things by which the pleasure of Allah is sought, and an oath to break ties of relationship is not binding
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan
Muhammad Muhyi Al-Din Abdul HamidHasan
Shuaib Al ArnautHasan
Zubair Ali ZaiHasan
In-book reference: 22:32