Numbers 30:2

2 aIf a man vows a vow to the Lord, or bswears an oath to bind himself by a pledge, he shall not break his word. cHe shall do according to all that proceeds out of his mouth.

Judges 11:36

36And she said to him, “My father, you have opened your mouth to the Lord; do to me according to what has gone out of your mouth, now that the Lord has avenged you on your enemies, on the Ammonites.”

Jeremiah 44:25

25Thus says the Lord of hosts, the God of Israel: dYou and your wives have declared with your mouths, and have fulfilled it with your hands, saying, ‘We will surely perform our vows that we have made, eto make offerings to the queen of heaven and to pour out drink offerings to her.’ Then confirm your vows and perform your vows!
Copyright information for ESV