Then Adonai spoke to Moses, saying:
“This will be an everlasting statute for you, to make atonement for Bnei-Yisrael once in the year because of all their sins.” It was done as Adonai commanded Moses.
“Speak to Aaron, to his sons, and to all Bnei-Yisrael, and say to them: This is the word which Adonai has commanded.
