Matthew 20:28

just as the Son of Man has come, not to be served but to serve, and to give His life a ransom price to set many free."

Revelation 5:9

Then they sang a new song: "You deserve to take the book and break its seals, because you have been slaughtered, and with your blood have bought men from every tribe, tongue, people, and nation,

Treasury of Scripture Knowledge

Summary

Only be sure that thou eat not the blood: for the blood is the life; and thou mayest not eat the life with the flesh.

Bible References

The blood is

Matthew 20:28
just as the Son of Man has come, not to be served but to serve, and to give His life a ransom price to set many free."
Revelation 5:9
Then they sang a new song: "You deserve to take the book and break its seals, because you have been slaughtered, and with your blood have bought men from every tribe, tongue, people, and nation,