Numbers 30:2 establishes the binding nature of vows — the vow here in Numbers 21:2 is a specific instance of that principle.

Genesis 28:20 records Jacob’s conditional vow — mirroring Israel’s vow formula here: 'If you do X, then I will do Y.'

Leviticus 27:28 defines the law of devoted things (herem) — the same concept Israel vows to apply against the Canaanites here.

Leviticus 27:29 states that devoted persons cannot be redeemed — reflecting the utter destruction vowed here.

Deuteronomy 13:15 commands utter destruction of an apostate city — the same herem practice vowed here against Canaanite cities.

Joshua 6:17 shows the herem destruction of Jericho — a fulfillment of the kind of vow made here against Canaanite cities.

Judges 11:30 shows Jephthah making a conditional vow before battle, exactly like Israel’s vow here — a pattern of vowing for victory.

1 Samuel 1:11 has Hannah making a conditional vow for a child — same structure of conditional dedication, though for a different purpose.

Deuteronomy 2:34 describes the same herem practice — total destruction of enemy cities — as vowed here against the Canaanites.

Deuteronomy 3:6 repeats the pattern of utter destruction, mirroring the vow made here to devote cities to God.

Deuteronomy 13:16 applies the same utter destruction to an apostate Israelite city, expanding the herem principle beyond external enemies.

Deuteronomy 20:16 commands total destruction of Canaanite cities — the very act vowed here in Numbers 21:2.

In 2 Samuel 15:8, Absalom's conditional vow mirrors the structure here — a vow with a condition, but for a different purpose (return vs destruction).