First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
Chapter 17
39And David having girded his sword upon his armour, began to try if he could walk in armour: for he was not accustomed to it. And David said to Saul: I cannot go thus, for I am not used to it. And he laid them off,
Original from Project Gutenberg - Massive cleanup of OCR problems and editing done locally.