Jude 1:4

For certain men have crept in stealthily [gaining entrance secretly by a side door]. Their doom was predicted long ago, ungodly (impious, profane) persons who pervert the grace (the spiritual blessing and favor) of our God into lawlessness and wantonness and immorality, and disown and deny our sole Master and Lord, Jesus Christ (the Messiah, the Anointed One).