Sin-Offering: Consisted of a Young Bullock or He-Goat for the Congregation

…when they become aware of the sin they have committed, then the assembly must bring a young bull as a sin offering and present it before the Tent of Meeting.

…he shall present the goat chosen by lot for the LORD and sacrifice it as a sin offering.

Then they brought the goats for the sin offering before the king and the assembly, who laid their hands on them.