Bible Verses About Redemption: Alone can learn the songs of heaven

And they sung as it were a new canticle, before the throne and before the four living creatures and the ancients: and no man could say the canticle, but those hundred forty-four thousand who were purchased from the earth.

These are they who were not defiled with women: for they are virgins. These follow the Lamb whithersoever he goeth. These were purchased from among men, the firstfruits to God and to the Lamb.