Buraidah (May Allah be pleased with him) said: The Messenger of Allah ﷺ said, "He who swears by Amanah (trust) is not one of us". Abu Dawud with authentic Isnad.
The Prophet Muhammad ﷺ also taught us that if we make a promise or an oath, we must keep it no matter what the cost may be because breaking a promise or an oath can have serious consequences both in this life and the hereafter. We must always strive to keep our word even if it means sacrificing something else for its sake because Allah rewards those who are truthful and honest with their promises and oaths.