Psalm 78:44

How he turned their waters into blood, so that they might not drink of the rivers;

Psalm 105:29

He turned their waters into blood, and slew their fish.

Exodus 7:17-21

Wherefore, thus sayeth the LORD: hereby thou shalt know that I am the LORD. Behold, I will smite with the staff that is in mine hand upon the waters that are in the river, and they shall turn to blood.

Revelation 16:3-6

And the second angel shed out his vial upon the sea, and it turned as it were into the blood of a dead man, and every living thing died in the sea.

Treasury of Scripture Knowledge

Summary

And had turned their rivers into blood; and their floods, that they could not drink.

Bible References

General references

Psalm 105:29
He turned their waters into blood, and slew their fish.
Exodus 7:17
Wherefore, thus sayeth the LORD: hereby thou shalt know that I am the LORD. Behold, I will smite with the staff that is in mine hand upon the waters that are in the river, and they shall turn to blood.
Revelation 16:3
And the second angel shed out his vial upon the sea, and it turned as it were into the blood of a dead man, and every living thing died in the sea.