A lamb for a individual (Gen 4:4)
A lamb for a household (Exo 12:3)
A lamb for a nation (Eze 45:15)
The lamb for the world
"Behold the Lamb of God, which taketh away the sin of the world." John 1:29
"He was oppressed, and He was afflicted, yet He opened not his mouth: He is brought as a lamb to the slaughter, and as a sheep before her shearers is dumb, so He openeth not His mouth." Isaiah 53:7