Exodus 7:22-24

Revised Geneva Translation

²² And the enchanters of Egypt did the same with their sorceries. And the heart of Pharaoh was hardened, so that he did not listen to them (as the LORD had said).

²³ Then Pharaoh returned and went back into his house; and this still did not enter into his heart.

²⁴ All the Egyptians then dug all around the river for waters to drink (for they could not drink the water of the river).