Hadith 3834
´It was narrated that Ibn 'Umar said:` "The Messenger of Allah said: 'A vow does not bring anything forward or put it back; it is just a means of taking wealth from the miserly.'"
Hadith 3835
´It was narrated from Abu Hurairah that the Messenger of Allah said:` "A vow does not bring anything to the son of Adam that has not been decreed for him. It is just a means of taking wealth from the miserly."