Agnus Dei

There are many different versions of this ancient prayer, both said and sung. The most familiar for English-speaking Protestants is from The Book of Common Prayer:

Traditional Version

O Lamb of God, that takest away the sins of the world,
Have mercy upon us.

O Lamb of God, that takest away the sins of the world,
Have mercy upon us.

O Lamb of God, that takest away the sins of the world,
Grant us thy peace.

Contemporary Version

O Lamb of God, who takes away the sins of the world,
Have mercy upon us.

O Lamb of God, who takes away the sins of the world,
Have mercy upon us.

O Lamb of God, who takes away the sins of the world,
Grant us your peace.