First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
13:13And Samuel said to Saul: Thou hast done foolishly, and hast not kept the commandments of the Lord thy God, which he commanded thee. And if thou hadst not done thus, the Lord would now have established thy kingdom over Israel for ever:
Original from Project Gutenberg - Massive cleanup of OCR problems and editing done locally.