A lamb is a young sheep. In the Bible, lambs are part of the broader group called sheep, which includes both young and adult animals.
Lambs were often used for sacrifices in Israel’s worship (Exodus 12:3–6; Leviticus 4:32).
In the New Testament, “Lamb of God” is a title for Jesus Christ (John 1:29). It means Jesus gave his life as the final sacrifice to take away the sins of the world (1 Peter 1:19; Revelation 5:6). This connects to the lambs killed at Passover. God told the Israelites to mark their doors with the lamb’s blood so they would be spared from death in Egypt (Exodus 12:21–27).