The Book of Vows (Kitab Al-Nadhr)
Muslim :: Book 14 : Hadith 4025
Abu Huraira reported Allah's Apostle (may peace be upon him) as saying: The vow does not bring anything near to the son of Adam which Allah has not ordained for him, but (at times) the vow coincides with Destiny, and this is how something is extracted from the miserly person, which that miser was not willing to give.