Exodus 7:23 BBE

²¹  And the fish in the Nile came to destruction, and a bad smell went up from the river, and the Egyptians were not able to make use of the water of the Nile for drinking; and there was blood through all the land of Egypt.

²²  And the wonder-workers of Egypt did the same with their secret arts: but Pharaoh's heart was made hard, and he would not give ear to them, as the Lord had said.

²³  Then Pharaoh went into his house, and did not take even this to heart.

²⁴  And all the Egyptians made holes round about the Nile to get drinking-water, for they were not able to make use of the Nile water.

²⁵  And seven days went past, after the Lord had put his hand on the Nile.