Mishkat al-Masabih 15 Oaths and Vows كتاب الإيمان والنذور 22

وَعَنْ عَائِشَةَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «مَنْ نَذَرَ أَنْ يُطِيعَ اللَّهَ فَلْيُطِعْهُ وَمَنْ نَذَرَ أَنْ يَعْصِيَهُ فَلَا يَعْصِهِ» . رَوَاهُ البُخَارِيّ

‘A’isha reported God’s Messenger as saying, “If anyone vows to obey God let him obey Him, but if anyone vows to disobey Him let him not disobey Him.” Bukhari transmitted it.