Psalm 78:44

And he turned to blood their rivers, and their flowings they shall not drink

Psalm 105:29

He turned their waters to blood, and he will slay their fish.

Exodus 7:17-21

Thus said Jehovah, In this thou shalt know that I am Jehovah: Behold me smiting with the rod which is in my hand upon the waters that in the river, and they were turned into blood.

Revelation 16:3-6

And the second angel poured out his vial into the sea; and it was blood as of a dead body: and every living soul 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 to blood, and he will slay their fish.
Exodus 7:17
Thus said Jehovah, In this thou shalt know that I am Jehovah: Behold me smiting with the rod which is in my hand upon the waters that in the river, and they were turned into blood.
Revelation 16:3
And the second angel poured out his vial into the sea; and it was blood as of a dead body: and every living soul died in the sea.