9 The fruit of the earth was first in Jerusalem. For from thence began the Church: there came there the Holy Spirit, and filled full the holy men gathered together in one place; miracles were done, with the tongues of all men they spoke. They were filled full of the Spirit of God, the people were converted that were in that place, fearing and receiving the divine shower, by confession they brought forth so much fruit, that all their goods they brought together into a common stock, making distribution to the poor, in order that no one might call anything his own, but all things might be to them in common, and they might have one soul and one heart unto God. For there had been forgiven them the blood which they had shed, it had been forgiven them by the Lord pardoning, in order that now they might even learn to drink that which they had shed.
Great in that place is the fruit: the earth has given her fruit, both great fruit, and most excellent fruit. Ought by any means that earth alone to give her fruit? “May there bless us God, our God, may there bless us God”. Still may He bless us: for blessing in multiplication is wont most chiefly and properly to be perceived. Let us prove this in Genesis; see the works of God: God made light, and God made a division between light and darkness: the light He called day, and the darkness He called night.
It is not said, He blessed the light. For the same light returns and changes by days and nights. He calls the sky the firmament between waters and waters: it is not said, He blessed the sky: He severed the sea from the dry land, and named both, the dry land earth, and the gathering together of the waters sea: neither here is it said, God blessed....
Source: The Enarrations, or Expositions, on the Psalms (New Advent)