forbade vowing and said: "Indeed, it does not bring any good; rather it is only a means to extract something from the miser

The Prophet (may Allah's peace and blessings be upon him) forbade making a vow, which means that a person obliges himself to do something not ordained upon him by the Shariah. He said: A vow does not advance anything or postpone it. Rather. it is only a means whereby something can be extracted from the miser who only does what is obligatory for him; and a vow does not bring about something that had not been predestined for him.