“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.”
King James Version (KJV)
18:10 The evil spirit, &c. - His fits of frenzy returned upon him. The very next day after he conceived envy at David, the evil spirit was permitted by God to seize him again. Such is the fruit of envy and uncharitableness. Prophesied - That is, he used uncouth gestures, and signs, as the prophets often did.