Exodus 7:17-19

Complete Jewish Bible

¹⁷ so Adonai says, “This will let you know that I am Adonai”: I will take the staff in my hand and strike the water in the river, and it will be turned into blood. ¹⁸ The fish in the river will die, the river will stink and the Egyptians won’t want to drink water from the river.’”

¹⁹ Adonai said to Moshe, “Say to Aharon, ‘Take your staff, reach out your hand over the waters of Egypt, over their rivers, canals, ponds and all their reservoirs, so that they can turn into blood. There will be blood throughout the whole land of Egypt, even in the wooden buckets and stone jars.’”