Charles H. Spurgeon on Psalms 147:12

Praise the Lord, O Jerusalem; praise thy God, O Zion. How the poet insists upon praise: he cries praise, praise, as if it were the most important of all duties. A peculiar people should render peculiar praise. The city of peace should be the city of praise; and the temple of the covenant God should resound with his glories. If nowhere else, yet certainly in Zion there should be joyful adoration of Zion's God. Note, that we are to praise the Lord in our own houses in Jerusalem as well as in his own house in Zion. The holy city surrounds the holy hill, and both are dedicated to the holy God, therefore both should ring with hallelujahs.