1 Samuel 17:9

17:9 If he is able to fight with me and strike me down, we will become your servants. But if I prevail against him and strike him down, you will become our servants and will serve us.”

1 Samuel 17:39

17:39 David strapped on his sword over his fighting attire and tried to walk around, but he was not used to them. David said to Saul, “I can’t walk in these things, for I’m not used to them.” So David removed them.