Matthew 20:28

just as the Son of Man came not to be served but to serve, and to give His life as the redemption-price for many."

Revelation 5:9

And now they sing a new song. "It is fitting," they say, "that Thou shouldst be the One to take the book And break its seals; Because Thou hast been offered in sacrifice, And hast purchased for God with Thine own blood Some out of every tribe and language and 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 came not to be served but to serve, and to give His life as the redemption-price for many."
Revelation 5:9
And now they sing a new song. "It is fitting," they say, "that Thou shouldst be the One to take the book And break its seals; Because Thou hast been offered in sacrifice, And hast purchased for God with Thine own blood Some out of every tribe and language and people and nation,