Exodus 29:30

The son who succeeds him as priest and comes to the Tent of Meeting to minister in the Holy Place is to wear them seven days.

(New International Version)

'For seven days the one of his sons who is priest in his stead shall put them on when he enters the tent of meeting to minister in the holy place.

(New American Standard Bible)

And that son that is priest in his stead shall put them on seven days, when he cometh into the tabernacle of the congregation to minister in the holy place.

(King James Version)