Leviticus 13:31

And if the priest looks on the disease of the scall, and, behold, the appearance of it is not deeper than the skin, and there is no black hair in it, then the priest shall shut up the disease of the scall seven days.

Treasury of Scripture Knowledge

Summary

And if the priest look on the plague of the scall, and, behold, it be not in sight deeper than the skin, and that there is no black hair in it; then the priest shall shut up him that hath the plague of the scall seven days:

Seven days

Bible References

Seven days

Leviticus 13:4
And if the bright spot is white in the skin of his flesh, and the appearance of it is not deeper than the skin, and the hair of it be not turned white, then the priest shall shut up the disease seven days.