Luke

When the unclean spirit is gone out of a man, he walketh through dry places, seeking rest, and findeth none.

Then goeth he, and taketh with himself seven other spirits more wicked than himself, and they enter in and dwell there: and the last state of that man is worse than the first. Even so shall it be also unto this wicked generation.

For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning.

For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost,

Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour: