Leviticus 13:31

But if the priest examines the diseased area of the skin's infection and {if} its appearance is not deeper than the skin and there is no black hair in it, then the priest shall confine the afflicted person [with] the diseased area of skin [for] 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
But if a spot [is] white on his body's skin and its appearance is not deeper than the skin and its hair does not turn white, then the priest shall confine the afflicted person [for] seven days.