Numbers 21:3-6

³And the Lord hearkened to the voice of Israel, and he delivered up the Canaanites; and they devoted them and their cities: and they called the name of the place Chormah.

⁴And they set forward from mount Hor by the way to the Red Sea, to go round the land of Edom: and the spirit of the people became impatient because of the way.

⁵And the people spoke against God, and against Moses, Wherefore have ye brought us up out of Egypt to die in the wilderness? for there is no bread, and there is no water; and our soul loatheth this miserable bread.

⁶And the Lord let loose against the people poisonous serpents, and they bit the people; and there died much people of Israel.