Matthew 20:28

as the Son of man came not to be served, but to serve, and to give His soul a ransom for many.

Revelation 5:9

And they sing a new song, saying, Thou art worthy to receive the book, and to open its seals: because thou wast slain, and didst with thy blood redeem unto God out of every tribe, and tongue, 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
as the Son of man came not to be served, but to serve, and to give His soul a ransom for many.
Revelation 5:9
And they sing a new song, saying, Thou art worthy to receive the book, and to open its seals: because thou wast slain, and didst with thy blood redeem unto God out of every tribe, and tongue, and people, and nation;