Bamidbar 21:8-9

Orthodox Jewish Bible

⁸ And Hashem said unto Moshe, Make thee a fiery serpent, set it upon a pole; and it shall come to pass, that every one that is bitten, when he looketh upon it, shall live.

⁹ And Moshe made a nachash of nechoshet, put it upon a pole, and it came to pass, that if a nachash had bitten any man, when he beheld the nachash hanechoshet, then he lived [see Yn 3:14-15].