1 Samuel 17:39-41

New Revised Standard Version, Anglicised Catholic Edition

³⁹ David strapped Saul’s sword over the armour, and he tried in vain to walk, for he was not used to them. Then David said to Saul, ‘I cannot walk with these; for I am not used to them.’ So David removed them. ⁴⁰ Then he took his staff in his hand, and chose five smooth stones from the wadi, and put them in his shepherd’s bag, in the pouch; his sling was in his hand, and he drew near to the Philistine.

⁴¹ The Philistine came on and drew near to David, with his shield-bearer in front of him.