(2) باب النَّهْىِ عَنِ النَّذْرِ، وَأَنَّهُ، لاَ يَرُدُّ شَيْئًا
Ibn Umar reported Allah's Apostle (ﷺ) as saying:
The vow neither hastens anything nor defers anything, but is the means whereby (something) is extracted from the miserly person.
Reference: Sahih Muslim 1639 b
In-book reference: Book 26, Hadith 4
USC-MSA web (English) reference(deprecated numbering scheme): Book 14, Hadith 4020