The term "Lamb of God" refers to a title used in Christianity to describe Jesus Christ. It symbolizes innocence and sacrifice, representing the belief that Jesus was sent to atone for humanity's sins. This concept is rooted in the Old Testament, where lambs were often used as sacrificial offerings. In the New Testament, the phrase appears in the writings of John the Baptist, who identifies Jesus as the Lamb of God during His baptism. This title emphasizes the idea of redemption and the promise of salvation, central themes in Christian theology.