1 Samuel 18:10

And it came to pass on the morrow, that the evil spirit from God came upon Saul, and he prophesied in the midst of the house: and David played with his hand, as at other times: and [there was] a javelin in Saul's hand.

Ver. 10. The evil spirit from God came upon Saul.] By discontent and envy the devil windeth himself into the heart, and setteth all on a hurry.

And he prophesied in the midst of the house.] As those heathen enthusiasts, the sibyls, and other like, did in a wild, raving, and raging sort, when acted and agitated by the devil. These Plato and Plutarch a call prophets. The Chaldee here hath it, And he was mad in the midst of the house: More desipientium aliena et absurda loquebatur, he spake as one distracted.

And there was a javelin in Saul's hand.] Which he carried always for his own defence, being ever in fear; and now more terrible to himself, than ever he had been to others.

a In Timaeo, lib. de Orac.