Brought it to Jerusalem; either to terrify the Jebusites, who yet held the fort of Zion, 2 Samuel 5:7; or for some other reason not recorded, nor now known. In his tent, i.e. in the tent which was erected for him in the camp, upon this occasion. There it was kept for the present, though afterwards it seems to have been translated to the tabernacle, where we find his sword, 1Sa 21, and it is not unlikely the rest of his armour was there also.
Related Commentaries of 1 Samuel 17:54
1 Samuel 17:54
54 And David took the head of the Philistine, and brought it to Jerusalem; but he put his armour in his tent.