Deuteronomy 23:23
That which is gone out of thy lips thou shalt keep and perform; even a freewill offering, according as thou hast vowed unto the Lord thy God, which thou hast promised with thy mouth.
Cross-reference
Numbers 30:2 reinforces the law: a man must not break his word but do all that proceeds from his mouth.
Judges 11:35 demonstrates the binding nature of a vow, as Jephthah says he cannot go back on his word.
Psalm 66:13 expresses the psalmist's determination to pay his vows, aligning with the command to fulfill vows.
Psalm 66:14 recalls that the vows were spoken in trouble, giving context to the obligation to pay them.
Psalm 116:18 affirms the commitment to pay vows publicly, echoing the requirement to perform what is spoken.
Proverbs 20:25 warns against rash vows and later reconsidering, complementing the instruction to keep vows.
Ecclesiastes 5:4 echoes this command, urging prompt payment of vows to God.
Ecclesiastes 5:5 adds that it's better not to vow than to vow and not pay.
1 Samuel 1:11 shows Hannah making a vow to dedicate her son to the Lord, a faithful example of vowing.
1 Samuel 14:24 shows a rash vow by Saul that endangered his army—a negative example.
Judges 11:30 provides an example of a vow made in desperate circumstances, illustrating the act of vowing.
Judges 11:31 shows the specific content of Jephthah's rash vow, highlighting the danger of hasty promises.
Mark 6:22 records Herod's rash promise to Herodias' daughter, leading to John's death.