Bulugh al-Maram 1384

Ibn Umar (may Allah be pleased with them both) reported that the Prophet (Allah bless him and give him peace) forbade vows and said: ‘They bring no good; they only extract [a payment] from a miser.’ They agreed upon it; this is Muslim’s wording. It is authentic; al-Bukhari transmitted it (6608), and Muslim (1639). Another wording in both says, ‘They avert nothing,’ and continues similarly. One version in Muslim says, ‘they extract it from a stingy person.’ Another wording in both says, ‘A vow neither advances nor delays anything,’ and continues similarly.