Psalm 78:44

So that their rivers were turned to blood, and they were not able to get drink from their streams.

Psalm 105:29

At his word their waters were turned to blood, and he sent death on all their fish.

Exodus 7:17-21

So the Lord says, By this you may be certain that I am the Lord; see, by the touch of this rod in my hand the waters of the Nile will be turned to blood;

Revelation 16:3-6

And the second let what was in his vessel come out into the sea; and it became blood as of a dead man; and every living thing in the sea came to an end.

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
At his word their waters were turned to blood, and he sent death on all their fish.
Exodus 7:17
So the Lord says, By this you may be certain that I am the Lord; see, by the touch of this rod in my hand the waters of the Nile will be turned to blood;
Revelation 16:3
And the second let what was in his vessel come out into the sea; and it became blood as of a dead man; and every living thing in the sea came to an end.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain