1 Samuel 17:39

39 And David took Saul's sword and put the band round him over the metal coat, and was unable to go forward; for he was not used to them. Then David said to Saul, It is not possible for me to go out with these, for I am not used to them. So David took them off.

1 Samuel 17:39 In-Context

37 And David said, The Lord, who kept me safe from the grip of the lion and the bear, will be my saviour from the hands of this Philistine. And Saul said to David, Go! and may the Lord be with you.
38 Then Saul gave David his clothing of war, and put a head-dress of brass on his head and had him clothed with a coat of metal.
39 And David took Saul's sword and put the band round him over the metal coat, and was unable to go forward; for he was not used to them. Then David said to Saul, It is not possible for me to go out with these, for I am not used to them. So David took them off.
40 Then he took his stick in his hand, and got five smooth stones from the bed of the stream and put them in a bag such as is used by sheep-keepers; and in his hand was a leather band used for sending stones: and so he went in the direction of the Philistine.
41 And the Philistine came nearer to David; and the man who had his body-cover went before him.
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