Acts 20:29-32

I know that after I leave, some people will come like wild wolves and try to destroy the flock. Also, some from your own group will rise up and twist the truth and will lead away followers after them. So be careful! Always remember that for three years, day and night, I never stopped warning each of you, and I often cried over you. “Now I am putting you in the care of God and the message about his grace. It is able to give you strength, and it will give you the blessings God has for all his holy people.