Sahih al-Bukhari, Hadith 6696 ⓘ
Narrated `Aisha: The Prophet said, "Whoever vows that he will be obedient to Allah, should remain obedient to Him; and whoever made a vow that he will disobey Allah, should not disobey Him."
حَدَّثَنَا أَبُو نُعَيْمٍ، حَدَّثَنَا مَالِكٌ، عَنْ طَلْحَةَ بْنِ عَبْدِ الْمَلِكِ، عَنِ الْقَاسِمِ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " مَنْ نَذَرَ أَنْ يُطِيعَ اللَّهَ فَلْيُطِعْهُ، وَمَنْ نَذَرَ أَنْ يَعْصِيَهُ فَلاَ يَعْصِهِ " .
also referenced under: Book 83, Hadith 73 (In-Book) & Volume 8, Book 78, Hadith 687 (USC-MSA)