1 Samuel (Author Compiled by Isaiah from records of Samuel, David, Nathan, and Gad.)
18:10And it cometh to pass, on the morrow, that the spirit of sadness from God prospereth over Saul, and he prophesieth in the midst of the house, and David is playing with his hand, as day by day, and the javelin is in the hand of Saul,
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.