Angels Cannot Sing the Song of Redemption

My brothers pray for their victims,
singing a harpists' new song,
a new hymn before the throne,
before mankind, before God,
before the four living creatures,
and before the elders.

They sing a hymn not learned
by all, except by those
following the Lamb. They
are the ransomed, forgiven,
absolved, and have the Father's
name written on their foreheads.