Parshat Acharei Mot

Following the deaths of Nadav and Avihu, G‑d warns against unauthorized entry “into the holy.” Only one person, the kohen gadol (“high priest”), may, but once a year, on Yom Kippur, enter the innermost chamber in the Sanctuary to offer the sacred ketoret to G‑d.

Another feature of the Day of Atonement service is the casting of lots over two goats, to determine which should be offered to G‑d and which should be dispatched to carry off the sins of Israel to the wilderness.