1 Samuel 18:10-11

On the morrow the evil spirit from God Which had formerly troubled him, producing melancholy, (1 Samuel 16:14,) was brought again upon him. The very next day after he conceived envy at David, discontent and anger, the evil spirit was permitted by God to seize him again. Such is the fruit of envy and uncharitableness! And he prophesied in the midst of the house That is, he was actuated by such motions and agitations of body as the prophets sometimes were. And David played with his hand, as at other times To compose and quiet his disturbed spirits. And there was a javelin in Saul's hand Which he had provided on purpose, as the following words show, to despatch David. And Saul cast the javelin Being now quite under the power of that evil spirit. Twice Once now, and another time, on a like occasion, 1 Samuel 19:10.