Acts 20:27-28

20:27 For I did not hold back from announcing to you the whole purpose of God. 20:28 Watch out for yourselves and for all the flock of which the Holy Spirit has made you overseers, to shepherd the church of God that he obtained with the blood of his own Son.

Acts 20:31

20:31 Therefore be alert, remembering that night and day for three years I did not stop warning each one of you with tears.