Numbers 21:6

2 So Israel made a vow to the LORD: “If You will deliver this people into our hands, we will devote their cities to destruction.”

3 And the LORD heard Israel’s plea and delivered up the Canaanites. Israel devoted them and their cities to destruction; so they named the place Hormah.

4 Then they set out from Mount Hor along the route to the Red Sea, in order to bypass the land of Edom. But the people grew impatient on the journey

5 and spoke against God and against Moses: “Why have you led us up out of Egypt to die in the wilderness? There is no bread or water, and we detest this wretched food!”

6 So the LORD sent venomous snakes among the people, and many of the Israelites were bitten and died.

7 Then the people came to Moses and said, “We have sinned by speaking against the LORD and against you. Intercede with the LORD so He will take the snakes away from us.” So Moses interceded for the people.

8 Then the LORD said to Moses, “Make a fiery serpent and mount it on a pole. When anyone who is bitten looks at it, he will live.”

9 So Moses made a bronze snake and mounted it on a pole. If anyone who was bitten looked at the bronze snake, he would live.

10 Then the Israelites set out and camped at Oboth.

Read all of Numbers 21