Acts 20:29-32

²⁹I know that after I leave vicious wolves will come among you, and won't spare the flock.

³⁰From among your own group men will rise up perverting what is right and good so they can lead believers to follow them.

³¹So watch out! Don't forget that for three years I went on instructing all of you night and day, often crying over you.

³²Now I commit you in God's care and to the message of his grace, which is able to build you up and provide you with the inheritance that belongs to all who are kept right with him.