Psalm 136:17-20 similarly recounts God striking down Sihon and Og — the psalm here lists those same kings in a historical praise context.

Numbers 21:21-35 records the defeat of Sihon and Og, the very kings named here. Direct historical source.

Deuteronomy 2:30-37 recounts Sihon's defeat, providing the full narrative for the king mentioned here.

Deuteronomy 3:1-11 details the defeat of Og, the other king listed here. Same conquest account.

Nehemiah 9:22 explicitly mentions Sihon and Og as given to Israel, directly paralleling this verse.

Numbers 21:34 is God's promise to give Og into Israel's hand—the specific event behind Og's defeat here.

Numbers 32:33 recounts Moses giving the land of Sihon and Og to the tribes — the same conquest mentioned here in the psalm's historical summary.

Deuteronomy 1:4 records the defeat of Sihon and Og at Heshbon and Edrei — the same victory recalled in the psalm's list of conquered kingdoms.

Deuteronomy 2:32 gives the specific battle location where Sihon opposed Israel — the psalm alludes to this conquest.

Joshua 24:8 summarizes the defeat of the Amorites beyond the Jordan — the same conquest of Sihon's kingdom alluded to in the psalm.

Judges 10:11 recalls God saving Israel from the Amorites — the psalm specifies the defeat of their kings, Sihon and Og, as part of that salvation history.