Numbers 11:20

11:20 but a whole month, until it comes out your nostrils and makes you sick, because you have despised the Lord who is among you and have wept before him, saying, “Why did we ever come out of Egypt?”’”

Numbers 30:2

30:2 If a man makes a vow to the Lord or takes an oath of binding obligation on himself, he must not break his word, but must do whatever he has promised.