Numbers 21:23 describes Sihon refusing Israel passage and gathering his army — the same event Jephthah summarizes here as cause for war.

Numbers 21:24 describes Israel's victory and capture of Sihon's land — the same decisive outcome Jephthah references as proof of rightful possession.

Numbers 21:25 records Israel occupying Heshbon and the Amorite towns — the specific cities Jephthah claims as part of Israel's inherited territory.

Deuteronomy 2:32 records Sihon's failed battle at Jahaz — the same conflict Jephthah cites as Israel's defensive victory.

In Deuteronomy 2:33, the same battle is recounted: God gave Sihon into Israel's hand, defeating him.

Deuteronomy 2:34 details the complete destruction of Sihon's cities, expanding on the victory mentioned here.

Nehemiah 9:22 recaps God giving Israel the lands of Sihon and Og — the same divine grant Jephthah argues justifies Israel's possession.

Psalm 135:10-12 praises God for striking Sihon and Og and giving their land to Israel — the same conquest Jephthah uses to justify Israel's claim.

Psalm 136:17-21 credits God with defeating Sihon and Og and giving their land as a heritage — the same event Jephthah relies on here.

Deuteronomy 2:30 explains that God hardened Sihon's heart, giving the theological reason for his refusal.

Joshua 13:15-32 describes the land allotment to Reuben, Gad, and half-Manasseh, which includes the territory taken from Sihon.