¹And the Lord said to Moses, “Look, I have appointed you as God to Pharaoh, and Aaron your brother will be your prophet. ²You will speak everything that I command you, and Aaron your brother will speak to Pharaoh, and he will let the sons of Israel go from his land. ³And I will harden Pharaoh's heart, and I will increase my signs and miracles in the land of Egypt, ⁴but Pharaoh will not hearken to you, and I will place my hand on Egypt, and I will bring my companies out – my people the sons of Israel – from the land of Egypt, with great judgments. ⁵And the Egyptians will know that I am the Lord when I stretch out my hand over Egypt, and I bring the sons of Israel out from their midst.” ⁶And Moses and Aaron did this. What the Lord commanded them, they did. ⁷Now Moses was eighty years old and Aaron was eighty-three years old when they spoke to Pharaoh. ⁸And the Lord spoke to Moses and to Aaron and said, ⁹“When Pharaoh speaks to you and says, ‘Produce a miracle for yourselves’, you will say to Aaron, ‘Take your rod and throw it in front of Pharaoh’, and it will become a serpent.” ¹⁰So Moses and Aaron came to Pharaoh and did so – as the Lord had commanded – and Aaron threw his rod in front of Pharaoh and in front of his servants, and it became a serpent. ¹¹Then Pharaoh for his part called for the wise men and the sorcerers, and they did this too – the magicians of Egypt with their enchantments – likewise. ¹²And they each threw their rod, and they became serpents, but Aaron's rod swallowed up their rods. ¹³And Pharaoh's heart hardened, and he would not hearken to them, as the Lord had said. ¹⁴And the Lord said to Moses, “Pharaoh's heart is unimpressionable – he refuses to let the people go. ¹⁵Go to Pharaoh in the morning and you will see that he is going out to the water, and you will stand where you will meet him on the bank of the river, and take in your hand the rod which changed into a serpent. ¹⁶And you will say to him, ‘The Lord God of the Hebrews sent me to you to say, «Let my people go so they can serve me in the desert», but look, you have not complied up to now. ¹⁷This is what the Lord says: «Here is how you will know that I am the Lord. I am about to strike the water which is in the river with the rod which is in my hand so that it turns to blood, ¹⁸and the fish that are in the river will die, and the river will stink, and Egypt will be at a loss to drink water from the river.» ’ ” ¹⁹Then the Lord said to Moses, “Say to Aaron, ‘Take your rod and stretch out your hand over the water of Egypt, over their rivers, over their channels, and over their pools and over every accumulation of their water, and they will become blood, and there will be blood in all the land of Egypt, and in vessels of wood and in channels of stone.’ ” ²⁰And Moses and Aaron did so, as the Lord had commanded, and he raised his rod and struck the water which was in the river, in Pharaoh's sight, and his servants' sight, and all the water which was in the river turned to blood. ²¹And the fish which were in the river died, and the river stank, and the Egyptians could not drink water from the river, and there was blood in all the land of Egypt. ²²But the magicians of Egypt did likewise with their secret arts, and Pharaoh's heart was hardened, and he did not hearken to them, as the Lord had said. ²³Pharaoh then turned and went back to his house, and he did not pay attention to this either. ²⁴And all Egypt dug around the river for water to drink, because they could not drink from the river-water. ²⁵And seven days passed after the Lord struck the river.

Reference(s) in Chapter 7: v.20 ↔ Revelation 16:3.