'Adherent' in the Bible

For they all know me of old--if they would but testify to the fact--how, being an adherent of the strictest sect of our religion, my life was that of a Pharisee.

and was progressing in Judaism beyond many contemporaries in my nation, [because] I was a far more zealous adherent of the traditions handed down by my forefathers.

And who [is] the one who will harm you if you are a zealous adherent for what is good?