Lamb of God
Definition from Wiktionary, the free dictionary
Loan translation of Latin Agnus Dei, itself a translation of Ancient Greek Ἀμνὸς τοῦ Θεοῦ (Amnòs toû Theoû). The name refers to Jesus' role as a sacrificial lamb that is (voluntarily) slaughtered on the Cross.
a title for Jesus that appears in the Gospel of John