Lamb
Lambs are cute and cuddly - the embodiment of innocence. They're also the animals God chose to use as sacrifices to pay for the sins of the Israelites. Under the Old Testament law, priests had to kill a lamb with no physical defects as payment for the guilt of an individual.

Later, God sent his own Son, Jesus Christ, to earth as the Lamb of God. Because Jesus died to pay for the sins of all humanity, we never again need to sacrifice lambs. The innocent blood of Jesus covers our guilt, allowing us into God's kingdom for eternity.

After testing Abraham's faith, God provides a sacrificial lamb.
Genesis 22:1-14
In the final plague leading tot the Israelites' delivery from slavery in Egypt, God's angel of death skipped each home that was marked with the required lamb's blood on the doorway.
Exodus 12:1-13,21-32
Jesus Christ, the Passover Lamb of God, shed his innocent blood, which God accepts as payment for out sins.
John 1:29,36
1 Corinthians 5:7
1 Peter 1:18-19
Revelation 5:12-13
The Good Shepherd, Jesus Christ, loves and cares for his "lambs" (all individuals who believe in him alone for salvation).
Isaiah 40:10-11
John 21:15
The lamb of God will one day return to earth.
Revelation 5:6-8;6:1-17;7:9-17;12:1-17;17:14;19:6-10;21:9-27;22:1-5