Seven days shalt thou prepare every day a goat for a sin offering: they shall also prepare a young bullock, and a ram out of the flock, without blemish.
Exodus 29:35-37
35
'And thou hast done thus to Aaron and to his sons, according to all that I have commanded thee; seven days thou dost consecrate their hand;
36
and a bullock, a sin-offering, thou dost prepare daily for the atonements, and thou hast atoned for the altar, in thy making atonement on it, and hast anointed it to sanctify it;
37
seven days thou dost make atonement for the altar, and hast sanctified it, and the altar hath been most holy; all that is coming against the altar is holy.
Leviticus 8:33
and from the opening of the tent of meeting ye go not out seven days, till the day of the fulness, the days of your consecration -- for seven days he doth consecrate your hand;