Their king’s crown. The same Hebrew consonants that here form the words “their king” also form the name Malcham (or Milcoin), the national god of the Ammonites (Zeph. 1:5). Some thus believe that the crown taken by David was that of the idol rather than of the king, since the crown would seem to be too heavy to be worn by a man. A talent is about 75 lb. (34 kg.).
Precious stones. Literally, “a stone of preciousness.”
Set on David’s head. The grammar of this passage permits us to conclude that either the crown or the precious stone was set on David’s head. A crown of such weight could not have been worn for any length of time, nor would it be worn on ordinary occasions. The crown may have been placed, for a moment, on David’s head as a token of triumph, or the stone may have been taken from the crown and set in David’s crown. In either case the act signified David’s sovereignty over the Ammonites.