"[There is no vow to commit disobedience and] no vow concerning that which the son of Adam does not possess."  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ نَذْرَ فِي مَعْصِيَةٍ وَلاَ نَذْرَ فِيمَا لاَ يَمْلِكُ ابْنُ آدَمَ  

"There is no vow to commit disobedience, and the expiation (for such a vow) is the expiation for breaking an oath."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ نَذْرَ فِي مَعْصِيَةٍ وَكَفَّارَتُهُ كَفَّارَةُ يَمِينٍ  

"Whoever vows to obey Allah, let him obey Him, and whoever vows to disobey Allah, let him not disobey Him. "  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ نَذَرَ أَنْ يُطِيعَ اللَّهَ فَلْيُطِعْهُ وَمَنْ نَذَرَ أَنْ يَعْصِيَ اللَّهَ فَلاَ يَعْصِهِ