That the Messenger of Allah (ﷺ) said: "Do not vow, for the vows does not prevent what is decreed at all, and it only causes the miser to spend (of his wealth)."
Reference: Jami` at-Tirmidhi 1538 In-book : Book 20, Hadith 17 English translation : Vol. 3, Book 18, Hadith 1538
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