Acts 20:28-30

28Take heed therefore to yourselves, and to all the flock, wherein the Holy Spirit has set you as overseers, to shepherd the assembly of 1God, which he has purchased with the blood of his own.

29[For] I know [this,] that there will come in amongst you after my departure grievous wolves, not sparing the flock;

30and from among your own selves shall rise up men speaking perverted things to draw away the disciples after them.