Numbers 21:7-14

⁷And the people came to Moses and said, We have sinned, for we have spoken against the Lord, and against you: pray therefore to the Lord, and let him take away the serpent from us.

⁸And Moses prayed to the Lord for the people; and the Lord said to Moses, Make you a serpent, and put it on a signal-staff; and it shall come to pass that whenever a serpent shall bite a man, every one so bitten that looks upon it shall live.

⁹And Moses made a serpent of brass, and put it upon a signal-staff: and it came to pass that whenever a serpent bit a man, and he looked on the brazen serpent, he lived.

¹⁰And the children of Israel departed, and encamped in Oboth.

¹¹And having departed from Oboth, they encamped in Achalgai, on the farther side in the wilderness, which is opposite Moab, toward the east.

¹²And thence they departed, and encamped in the valley of Zared.

¹³And they departed thence and encamped on the other side of Arnon in the wilderness, the country which extends from the coasts of the Amorites; for Arnon is the borders of Moab, between Moab and the Amorites.

¹⁴Therefore it is said in a book, A war of the Lord has set on fire Zoob, and the brooks of Arnon.