'Lunatic' in the Bible

"The Lord has made you priest in place of Jehoiada. He has put you in charge in the Lord's temple of controlling any lunatic who pretends to be a prophet. And it is your duty to put any such person in the stocks with an iron collar around his neck.

and saying, 'Sir, deal kindly with my son, for he is lunatic, and doth suffer miserably, for often he doth fall into the fire, and often into the water,