Sanctified is not JUSTIFIED.A believer must be justified before...

Sanctified is not JUSTIFIED.
A believer must be justified before they start the process of sanctification.
Can you list the verse/s where Paul teaches a believer can lose their JUSTIFICATION ?
A simple verse answers a simple question ?
eg
Where does Paul teach that a believer is NOT justified by works ?
ans Gal 2:16 for by the works of the law shall no flesh be justified