After a priest has become ceremonially clean, they must count off a period of seven days for him.

At the end of seven days the word of the Lord came to me:

For seven days they will make atonement for the altar and cleanse it, so they will consecrate it.

And during the seven days of the feast he will provide as a burnt offering to the Lord seven bulls and seven rams, all without blemish, on each of the seven days, and a male goat daily for a sin offering.

“‘In the first month, on the fourteenth day of the month, you will celebrate the Passover, and for seven days bread made without yeast will be eaten.

I came to the exiles at Tel Abib, who lived by the Kebar River. I sat dumbfounded among them there, where they were living, for seven days.

“For seven days you will provide every day a goat for a sin offering; a young bull and a ram from the flock, both without blemish, will be provided.

In the seventh month, on the fifteenth day of the month, at the feast, he will make the same provisions for the sin offering, burnt offering, and grain offering, and for the olive oil, for the seven days.