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.'
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.