In Numbers 21:21, Israel sends messengers to Sihon—the narrative beginning that leads to his defeat celebrated in Psalm 136:19.

Numbers 21:23 records Sihon’s refusal and attack—the immediate cause for God smiting him as Psalm 136:19 recalls.

Deuteronomy 2:30-36 explains God hardened Sihon’s heart and gave him over—adding theological depth to the victory in Psalm 136:19.

Deuteronomy 29:7 mentions Sihon and Og coming out to battle—a later summary that pairs the two kings from Psalm 136:19-20.

Numbers 21:24 describes the sword and land possession—filling in the details of the victory Psalm 136:19 summarizes.

Deuteronomy 1:4 notes Sihon’s location at Heshbon and includes Og—giving geographical context to the king named in Psalm 136:19.

Deuteronomy 2:32 pinpoints the battle at Jahaz—a specific location for the conflict Psalm 136:19 commemorates.

Deuteronomy 3:6 compares the destruction of Og to that of Sihon—confirming the totality of Sihon’s defeat from Psalm 136:19.

Joshua 12:2 records Sihon king of the Amorites—the same king Psalm 136:19 credits God with defeating.