I might be late to the party, but I just discovered this song and really love it. It's certainly not your typical "wedding song," but it tells and sings of the glorious redemption story, which makes it perfect for the wedding of two believers. Revelation 1:5b-6 says,
To him who loves us and has freed us from our sins by his blood and made us a kingdom, priests to his God and Father, to him be glory and dominion forever and ever. Amen.
This song rejoices in the blessed truth that Christ has washed us with his blood. There is nothing better to sing about on your wedding day!
This version is recorded by Jars of Clay featuring Martin Smith. Lyrics by John Newton and music by Laura Taylor of Indelible Grace.