Scapegoat

Scapegoat ceremony depicted at Lincoln Cathedral in stained glass: "[Aaron] is to take the two goats and present them before the Lord at the entrance to the tent of meeting. He is to cast lots for the two goats—one lot for the Lord and the other for the scapegoat. Aaron shall bring the goat whose lot falls to the Lord and sacrifice it for a sin offering. But the goat chosen by lot as the scapegoat shall be presented alive before the Lord to be used for making atonement by sending it into the wilderness as a scapegoat." (NIV, Leviticus 16:7–10)

A scapegoat is one of a pair of goats used in the Yom Kippur Temple service during the era of the Temple in Jerusalem. The scapegoat had a band of red wool placed on it, and was then released into the wilderness, taking with it all the sins and impurities of the people as an act of symbolic atonement. The other goat was sacrificed. The ritual is described in the Book of Leviticus of the Torah, and was performed by the High Priest of Israel (of the lineage of Aaron):

Then Aaron shall lay both his hands on the head of the live goat, and confess over it all the iniquities of the people of Israel, and all their transgressions, all their sins, putting them on the head of the goat, and sending it away into the wilderness by means of someone designated for the task. The goat shall bear on itself all their iniquities to a barren region; and the goat shall be set free in the wilderness.

Practices with some similarities to the scapegoat ritual also appear in Ancient Greece and Ebla. The scapegoat ritual was performed throughout the Second Temple period, with historians such as Josephus mentioning it. With the destruction of the Second Temple in 70 AD, the scapegoat ritual became impossible to perform according to its original procedure, as there was no more Temple or High Priest.