Lamb of God

O Lamb of God, you take away the sin of the world,
look on us and have mercy on us;
You yourself are both Victim and Priest,
you both Reward and Redeemer,
keep safe from all evil those you have redeemed,
O Savior of the world.

Source: Iranaeus

Source of this version: Modified from http://marccortez.com/2012/06/24/a-prayer-for-sunday-irenaeus-of-lyon/

Also found here: http://www.mc-pro.com/kbc/pray-wk.html