Why should thy servant dwell in the royal city - He seemed to intimate that two princely establishments in the same city were too many. Achish appears to have felt the propriety of his proposal, and therefore appoints him Ziklag.
David, with characteristic Oriental subtlety (compare 1 Samuel 21:2), suggests as a reason for leaving Gath that his presence was burdensome and expensive to the king. His real motive was to be more out of the way of observation and control, so as to act the part of an enemy of Saul, without really lifting up his hand against him and his own countrymen of Israel.