Numbers 21:4-7

4And they journeyed from mount Hor by the way of the Red sea, to go around the land of Edom: and the soul of the people was much discouraged because of the way.1 5And the people spoke against God, and against Moses, Why have ye brought us out of Egypt to die in the wilderness? for there is no bread, neither is there any water; and our soul loatheth this light bread. 6And the LORD sent fiery serpents among the people, and they bit the people; and many people of Israel died. 7Therefore the people came to Moses, and said, We have sinned, for we have spoken against the LORD, and against thee; pray to the LORD, that he take away the serpents from us. And Moses prayed for the people.