Exodus 4:25

4:25 But Zipporah took a flint knife, cut off the foreskin of her son and touched it to Moses’ feet, and said, “Surely you are a bridegroom of blood to me.”

Exodus 7:17

7:17 Thus says the Lord: “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.

Exodus 7:21

7:21 When the fish that were in the Nile died, the Nile began to stink, so that the Egyptians could not drink water from the Nile. There was blood everywhere in the land of Egypt!

Exodus 22:3

22:3 If the sun has risen on him, then there is blood guilt for him. A thief must surely make full restitution; if he has nothing, then he will be sold for his theft.