Numbers 6:13
And this is the law of the Nazarite, when the days of his separation are fulfilled: he shall be brought unto the door of the tabernacle of the congregation:
Cross-reference
Acts 21:26
Parallel
In Acts 21:26, Paul performs this same Nazirite completion ritual, demonstrating continuity of the law in the early church.
Acts 21:24
Parallel
In Acts 21:24, Paul is told to join men under a vow and purify himself, directly applying this Nazirite law.