Jude 1:3-4

3Dear friends, although I was eager to write you about the salvation we share, I found it necessary to write, appealing to you to contend for the faith that was delivered to the saints once for all.

4For some people, who were designated for this judgment long ago, have come in by stealth; they are ungodly, turning the grace of our God into sensuality and denying Jesus Christ, our only Master and Lord.