TSK · Leviticus 13:58

So he went down and dipped in the Jordan seven times, as the prophet had instructed. His skin became as smooth as a young child’s and he was healed.

Self-Purification Therefore, since we have these promises, dear friends, let us cleanse ourselves from everything that could defile the body and the spirit, and thus accomplish holiness out of reverence for God.

They served only for matters of food and drink and various ritual washings; they are external regulations imposed until the new order came.