First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
26:21et ait Saul peccavi revertere fili mi David nequaquam enim ultra male tibi faciam eo quod pretiosa fuerit anima mea in oculis tuis hodie apparet quod stulte egerim et ignoraverim multa nimis
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.