Narrated 'Aisha: The Prophet ﷺ said, "Whoever vows that he will be obedient to Allah, should remain obedient to Him; and whoever made a vow that he will disobey Allah, should not disobey Him".
The Prophet Muhammad also taught us the importance of being honest in all our dealings with others as well as ourselves; this includes keeping our promises no matter how small they may seem at the time. He said “Whoever makes a promise must fulfill it” which shows how important it is for us to keep our word once given. By doing so, not only will we gain the pleasure of Allah but also earn respect from those around us who can trust in what we say and do.