1 Samuel 17:38-39

17:38 Then Saul clothed David with his own fighting attire and put a bronze helmet on his head. He also put body armor on him. 17:39 David strapped on his sword over his fighting attire and tried to walk around, but he was not used to them. ¹  David said to Saul, “I can’t walk in these things, for I’m not used to them.” So David removed them.

1 Samuel 17:45

17:45 But David replied to the Philistine, “You are coming against me with sword and spear and javelin. But I am coming against you in the name of the Lord of hosts, the God of Israel’s armies, whom you have defied!

[17:39]  ¹ tn Heb “he had not tested.”