Scripturist
Scrip"tur*ist\ (?; 135), n. One who is strongly attached to, or versed in, the Scriptures, or who endeavors to regulate his life by them. The Puritan was a Scripturist with all his heart, if as yet with imperfect intelligence . . . he cherished the scheme of looking to the Word of God as his sole and universal directory. --Palfrey.