'Cleansing' in the Bible

“But if the scab spreads farther on the skin after he has shown himself to the priest for his [ceremonial] cleansing, he shall show himself to the priest again.

But if the scale spreads farther on the skin after his cleansing,

He shall bring them on the eighth day for his [ceremonial] cleansing to the priest at the doorway of the Tent of Meeting, before the Lord.

This is the law for the one in whom there is an infection of leprosy, whose means are limited for his [ceremonial] cleansing.”