To teach when [it is] unclean, and when [it is] clean: this [is] the law of leprosy.
- King James Version

to teach when they are unclean and when they are clean. This is the law of leprosy.
- New American Standard Version (1995)

to teach when it is unclean, and when it is clean: this is the law of leprosy.
- American Standard Version (1901)

To make clear when it is unclean and when it is clean: this is the law about the disease of the leper.
- Basic English Bible

to teach when there is uncleanness, and when it is purified: this is the law of leprosy.
- Darby Bible

To teach when it is unclean, and when it is clean: this is the law of leprosy.
- Webster's Bible

to teach when it is unclean, and when it is clean. This is the law of leprosy.
- World English Bible

to direct in the day of being unclean, and in the day of being clean; this [is] the law of the leprosy.'
- Youngs Literal Bible

to teach when it is unclean, and when it is clean; this is the law of leprosy.
- Jewish Publication Society Bible

Wesley's Notes for Leviticus 14:57

14:57 To teach - To direct the priest when to pronounce a person or house clean or unclean. So it was not left to the priests power or will, but they were tied to plain rules, such as the people might discern no less than the priest.