Numbers 21:11

8 And the Lord said to Moses, Make an image of a snake and put it on a rod, and anyone who has been wounded by the snakes, looking on it will be made well.

9 So Moses made a snake of brass and put it on a rod; and anyone who had a snakebite, after looking on the snake of brass, was made well.

10 Then the children of Israel went on and put up their tents in Oboth.

11 And journeying on again from Oboth, they put up their tents in Iye-abarim, in the waste land before Moab looking east.

12 And moving on from there, they put up their tents in the valley of Zered.

13 From there they went on and put up their tents on the other side of the Arnon, which is on the waste land at the edge of the land of the Amorites; for the Arnon is the line of division between Moab and the Amorites:

14 As it says in the book of the Wars of the Lord, Vaheb in Suphah, and the valley of the Amon;