First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
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.