1 Samuel (Author Compiled by Isaiah from records of Samuel, David, Nathan, and Gad.)
20:12And Jonathan said unto David, O LORD God of Israel, when I have sounded my father about to morrow any time, or the third day, and, behold, if there be good toward David, and I then send not unto thee, and shew it thee;
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.