And I will harden the heart of Pharaoh, and he shall pursue after them; and I will be glorified in Pharaoh, and in all his army, and all the Egyptians shall know that I am the Lord. And they did so.

And all the Egyptians shall know that I am the Lord, stretching out My hand upon Egypt, and I will bring out the children of Israel from the midst of them.

Thus says the Lord: By this you shall know that I am the Lord: behold, I strike the water which is in the river with the rod that is in my hand, and it shall change it into blood.