Exodus 7:17
17 This is what the Lord has said: “By this you will know that I am the Lord: I am going to strike the water of the Nile with the staff that is in my hand, and it will be turned into blood. 18 Fish in the Nile will die, the Nile will stink, and the Egyptians will be unable to drink water from the Nile.”’” 19 Then the Lord said to Moses, “Tell Aaron, ‘Take your staff and stretch out your hand over Egypt’s waters—over their rivers, over their canals, over their ponds, and over all their gathered waters43—so that it becomes blood.’ There will be blood everywhere in the land of Egypt, even in wooden and stone containers.” 20 Moses and Aaron did so, just as the Lord had commanded. He raised the staff and struck the water that was in the Nile right before the eyes of Pharaoh and his servants, and all the water that was in the Nile was turned to blood.
Revelation 16:3
1 Then I heard a loud voice from the temple declaring to the seven angels: “Go and pour out on the earth the seven bowls containing God’s wrath.” 2 So the first angel went and poured out his bowl on the earth. Then ugly and painful sores appeared on the people who had the mark of the beast and who worshiped his image. 3 Next, the second angel poured out his bowl on the sea, and it turned into blood, like that of a corpse, and every living creature that was in the sea died. 4 Then the third angel poured out his bowl on the rivers and the springs of water, and they turned into blood. 5 Now I heard the angel of the waters saying:“You are just—the one who is and who was, the Holy One—because you have passed these judgments, 6 because they poured out the blood of your saints and prophets, so you have given them blood to drink. They got what they deserved!”
Notes and References
"... The seven bowl plagues are enumerated in Revelation 16:2–21: (1) The plague of sores or boils (verse 2; the sixth plague of Exodus 9:9) affects those who had received the brand of the beast and worshiped its image (continuing these motifs first mentioned in 13:15–16 and reiterated in 14:9–11). (2) The sea becomes blood, killing all sea creatures (verse 3), parallel to the effects of the second trumpet plague in 8:8–9 and reminiscent of the first plague of Exodus 7:20–21. (3) The rivers and wells become blood (verse 4), also reminiscent of the first plague of Exodus 7:20–21. This bowl plague is accompanied by a “judgment doxology” sung by a mysterious angel of the water, emphasizing the justice of God in avenging the death of his prophets and saints (verses 5–7). (4) The sun scorches people (verses 8–9; partially resembles the fire from heaven of the seventh plague of Exodus 9:22–24). (5) The throne of the beast (already mentioned in 13:2) and its kingdom are covered with darkness (verse 10), reminiscent of the ninth plague of Exodus 10:21 ..."
Aune, David Word Biblical Commentary: Revelation 6-16 (p. 1105) Zondervan, 2017