Moses and the Brass Snake by Van Dyck
And the Lord said to Moses, “Make a fiery serpent and set it on a pole, and everyone who is bitten, when he sees it, shall live.” So Moses made a bronze serpent and set it on a pole. And if a serpent bit anyone, he would look at the bronze serpent and live.
–Numbers 21:8-9 (ESV)
The Angel of Death and the First Passover in Foster Bible Pictures
You shall observe this rite as a statute for you and for your sons forever. And when you come to the land that the Lord will give you, as he has promised, you shall keep this service. And when your children say to you, ‘What do you mean by this service?’ you shall say, ‘It is the sacrifice of the Lord‘s Passover, for he passed over the houses of the people of Israel in Egypt, when he struck the Egyptians but spared our houses.’
–Exodus 12:24-27 (ESV)