1 Samuel 21:13

And he changed his behavior - Some imagine David was so terrified at the danger to which he was now exposed, that he was thrown into a kind of frenzy, accompanied with epileptic fits. This opinion is countenanced by the Septuagint, who render the passage thus: ; "Behold, ye see an epileptic man. Why have ye introduced him to me?" ; "Have I any need of epileptics, that ye have brought him to have his fits before me, ( ?" ) It is worthy of remark, that the spittle falling upon the beard, i.e., slavering or frothing at the mouth, is a genuine concomitant of an epileptic fit.

If this translation be allowed, it will set the conduct of David in a clearer point of view than the present translation does. But others think the whole was a feigned conduct, and that he acted the part of a lunatic or madman in order to get out of the hands of Achish and his courtiers. Many vindicate this conduct of David; but if mocking be catching, according to the proverb, he who feigns himself to be mad may, through the just judgment of God, become so. I dare not be the apologist of insincerity or lying. Those who wish to look farther into this subject may consult Dr. Chandler, Mr. Saurin, and Ortlob, in the first volume of Dissertations, at the end of the Dutch edition of the Critici Sacri.