This is how hard it is to relist verses :- Paul teaches JUSTIFICATION/saved by faith and not of works. Phew, sweat, sweat that was hard yakka 1 Cor 15:1-4, Eph 2:8-9, Gal 2:16, Rom 3:24-28, Rom 4:5-8, Titus 3:5, Eph 1:13, Eph 4:30 .. You turn :- Because Paul tells us a believer who is sanctified can lose sanctification - your claim Show the verses from Paul .. it stands to reason that a believer who is justified can lose justification -- your claim Show the verses from Paul.
