1 Samuel 17:37-39 New Revised Standard Version Catholic Edition (NRSVCE)
37 David said, “The Lord, who saved me from the paw of the lion and from the paw of the bear, will save me from the hand of this Philistine.” So Saul said to David, “Go, and may the Lord be with you!”
38 Saul clothed David with his armor; he put a bronze helmet on his head and clothed him with a coat of mail. 39 David strapped Saul’s sword over the armor, 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.
1 Samuel 17:37-39 New International Version (NIV)
37 The Lord who rescued me from the paw of the lion and the paw of the bear will rescue me from the hand of this Philistine.”
Saul said to David, “Go, and the Lord be with you.”
38 Then Saul dressed David in his own tunic. He put a coat of armor on him and a bronze helmet on his head. 39 David fastened on his sword over the tunic and tried walking around, because he was not used to them.
“I cannot go in these,” he said to Saul, “because I am not used to them.” So he took them off.