Of course the mere taking of a vow cannot truly purify the soul, so a sin offering was still brought—until Christ came.
BibleGateway: Numbers 6:13-21 ESV Text: Numbers 6:13-21 KJV Text: The section starts at about 1:56 and ends at about 3:49 13 And this is the law of the Nazarite, when the days of his separation… Of course the mere taking of a vow cannot truly purify the soul, so a sin offering was still brought—until Christ came.


