1 Samuel 17:37-39 World English Bible (WEB)
37 David said, “Yahweh, who delivered me out of the paw of the lion and out of the paw of the bear, will deliver me out of the hand of this Philistine.”
Saul said to David, “Go! Yahweh will be with you.”
38 Saul dressed David with his clothing. He put a helmet of bronze on his head, and he clad him with a coat of mail. 39 David strapped his sword on his clothing and he tried to move, for he had not tested it. David said to Saul, “I can’t go with these, for I have not tested them.” Then David took them off.