Sahih al-Bukhari 6700
Sahih al-Bukhari · Book 83: Oaths and Vows · To vow for something not possessed, and for something sinful
Narrated `Aisha:
حَدَّثَنَا أَبُو عَاصِمٍ ، عَنْ مَالِكٍ ، عَنْ طَلْحَةَ بْنِ عَبْدِ الْمَلِكِ ، عَنِ الْقَاسِمِ ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ قَالَ النَّبِيُّ صلى الله عليه وسلم " مَنْ نَذَرَ أَنْ يُطِيعَ اللَّهَ فَلْيُطِعْهُ، وَمَنْ نَذَرَ أَنْ يَعْصِيَهُ فَلاَ يَعْصِهِ " .
The Prophet (ﷺ) said, "Whoever vowed to be obedient to Allah, must be obedient to Him; and whoever vowed to be disobedient to Allah, should not be disobedient to Him."