Numbers 21:5-6

Amplified Bible

⁵ So the people spoke against God and against Moses, “Why have you brought us out of Egypt to die in the wilderness? For there is no bread, nor is there any water, and we loathe this miserable food.”

The Bronze Serpent

⁶ Then the Lord sent fiery (burning) serpents among the people; and they bit the people, and many Israelites died.