Numbers 21:4-6

4Then the people of Israel set out from Mount Hor, taking the road to the Red Sea to go around the land of Edom. But the people grew impatient with the long journey,

5and they began to speak against God and Moses. “Why have you brought us out of Egypt to die here in the wilderness?” they complained. “There is nothing to eat here and nothing to drink. And we hate this horrible manna!”

6So the Lord sent poisonous snakes among the people, and many were bitten and died.