Numbers 21

Israel defeats the king of Arad the Canaanite at Hormah after vowing to YHWH; they complain, suffer fiery serpents, and are healed by looking at the bronze serpent on the pole; YHWH delivers victories over Sihon king of the Amorites and Og king of Bashan.[2][4][6]

Interlinear Text

and he said YHWH to Moses not fear him for in your hand I have given him and obj all his people and obj his land and you shall do to him as you did to Sihon king of the Amorite who dwelt in Heshbon