Jamieson, Fausset and Brown on 2 Samuel 8:11

11. Which also king David did dedicate unto the Lord--Eastern princes have always been accustomed to hoard up vast quantities of gold. This is the first instance of a practice uniformly followed by David of reserving, after defraying expenses and bestowing suitable rewards upon his soldiers, the remainder of the spoil taken in war, to accumulate for the grand project of his life--the erection of a national temple at Jerusalem.