(26) باب الْوَفَاءِ بِالنَّذْرِ
Narrated Abu Huraira:
The Prophet (ﷺ) said, "Allah says, 'The vow, does not bring about for the son of Adam anything I have not decreed for him, but his vow may coincide with what has been decided for him, and by this way I cause a miser to spend of his wealth. So he gives Me (spends in charity) for the fulfillment of what has been decreed for him what he would not give Me before but for his vow."
Reference: Sahih al-Bukhari 6694
In-book reference: Book 83, Hadith 71
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 78, Hadith 685