1 Samuel 17:38-40

Revised Standard Version

³⁸ Then Saul clothed David with his armor; he put a helmet of bronze on his head, and clothed him with a coat of mail. ³⁹ And David girded his sword over his armor, and he tried in vain to go, for he was not used to them. Then David said to Saul, “I cannot go with these; for I am not used to them.” And David put them off. ⁴⁰ Then he took his staff in his hand, and chose five smooth stones from the brook, and put them in his shepherd’s bag or wallet; his sling was in his hand, and he drew near to the Philistine.