The Messenger of Allah ﷺ as saying: If anyone vows to obey Allah, let him obey Him, but if anyone vows to disobey Him, let him not disobey Him. (Using translation from Abū Dāʾūd 3289)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «مَنْ نَذَرَ أَنْ يُطِيعَ اللهَ فَلْيُطِعْهُ وَمَنْ نَذَرَ أَنْ يَعْصِيَ اللهَ فَلَا يَعْصِهِ»