'Sacrifice' in the Bible

Then, midway between the throne and the four living creatures, I saw a Lamb standing among the Elders. He looked as if He had been offered in sacrifice, and He had seven horns and seven eyes. The last-named are the seven Spirits of God, and have been sent far and wide into all the earth.

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,

and in loud voices they were singing, "It is fitting that the Lamb which has been offered in sacrifice should receive all power and riches and wisdom and might and honor and glory and blessing."

All the inhabitants of the earth will fall down and worship him, everyone whose name has not been written since the foundation of the world in the Book of Life of the Lamb who has been slain [as a willing sacrifice].