Radak

A Psalm of David: – David composed this Psalm that they might recite it as they brought the ark to the Most Holy House. And this was after he had offered a burnt-offering on Mount Moriah, and the place had been revealed to him, and he knew that there would be (built) the House of the Lord, as it is written in the Books of Chronicles (I. 22:1). And he says: The earth is the Lord's and the fulness thereof; The world and they that dwell therein: – And although the earth is the Lord's, this mountain is called the mountain of the Lord and His Holy Place (specifically), because it is His Holy Place in truth, for it is a habitation (in the earth) corresponding to the Throne of Glory (in heaven). And the expression הארץ (the. earth) includes the whole of the earth, as (Gen. 1:1) “the heavens and the earth”; and the expression תבל (world) is equivalent to the inhabited parts; therefore, in connexion with earth, he uses the phrase its fulness, and with world (he uses) and those that dwell therein.