Volume 8, Book 78, Number 691:
Narrated ‘Aisha:
The Prophet 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.”
Volume 8 – 1495 / 1700
SAHIH BUKHARI VOLUME 8 > BOOK 78: OATHS AND VOWS