The Messenger of Allah said: "There is no vow to commit an act of disobedience or with regard to that which the son of Adam does not possess." (Using translation from Nasāʾī 3851)  

قَالَ رَسُولُ اللَّهِ ﷺ «لَا وَفَاءَ لِنَذْرٍ فِي مَعْصِيَةِ اللَّهِ وَلَا فِيمَا لَا يَمْلِكُ ابْنُ آدَمَ»  

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)  

قَالَ رَسُولُ اللَّهِ ﷺ «مَنْ نَذَرَ أَنْ يَطِيعَ اللَّهَ فَلْيُطِعْهُ وَمَنْ نَذَرَ أَنْ يَعْصِيَ اللَّهَ فَلَا يَعْصِهِ»