Matthew 20:28

as the son of man came not to be ministred unto, but to minister, and to give his life a ransom for all.

Revelation 5:9

and they sung a new song, saying, "thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood, 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
as the son of man came not to be ministred unto, but to minister, and to give his life a ransom for all.
Revelation 5:9
and they sung a new song, saying, "thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood, out of every tribe, and language, and people, and nation;