Exodus 7:15-17

Lexham English Bible

¹⁵ Go to Pharaoh in the morning. Look, he is going out to the water, and you must wait to meet him on the bank of the Nile, and you must take in your hand the staff that was changed into a snake. ¹⁶ And you must say to him, ‘Yahweh, the God of the Hebrews, has sent me to you, saying, “Release my people that they may serve me in the desert, and, look, you have not listened until now.” ¹⁷ Thus says Yahweh, “By this you will know that I am Yahweh. Look, I am about to strike with the staff that is in my hand the water that is in the Nile, and it will be changed to blood.