Heard — The predictions of the prophets have been verified by the events. Establish — God will defend her in all succeeding ages. And so God would have done, if Jerusalem had not forsaken him, and forfeited his protection.
Related Commentaries of Psalms 48:8
Psalms 48:8
8 As we have heard, so have we seen in the city of the LORD of hosts, in the city of our God: God will establish it for ever. Selah.