'Forewarned' in the Bible

Remember, I have forewarned you.

But as for yourselves, be on your guard: I have forewarned you of everything.

Those who cling to their old sins, and indeed all of you, I have forewarned and still forewarn (as I did on my second visit when present, so I do now, though absent)

hard drinking, riotous feasting, and the like. And as to these I forewarn you, as I have already forewarned you, that those who are guilty of such things will have no share in the Kingdom of God.

For even when we were with you, we forewarned you, saying, "We are soon to suffer affliction;" and this actually happened, as you well know.