And the LORD said unto Moses, Make thee a fiery serpent, and set it upon a pole: and it shall come to pass, that every one that is bitten, when he looketh upon it, shall live. Numbers 21:8
Trivia: After God killed Korah, his companions, their families, and 250 incense burners, the people complained saying, "ye have killed the people of the Lord." So God sent a plague on the people. How many people died in the plague?