He shall come down like rain upon the mown grass: as showers that water the earth.
All Commentaries on Psalms 72:6 Go To Psalms 72
Augustine of Hippo
AD 430
9. "And He shall come down like rain into a fleece, and like drops distilling upon the earth" (ver. 6). He hath called to our minds and admonished us, that what was done by Gedeon the Judge, in Christ hath its end. For he asked a sign of the Lord, that a fleece laid on the floor should alone be rained upon, and the floor should be dry; and again, the fleece alone should be dry, and the floor should be rained upon; and so it came to pass. Which thing signified, that, being as it were on a floor in the midst of the whole round world, the dry fleece was the former people Israel. The same Christ therefore Himself came down like rain upon a fleece, when yet the floor was dry: whence also He said, "I am not sent but to the sheep which were lost of the house of Israel." There He chose out a Mother by whom to receive the form of a servant, wherein He was to appear to men: there the disciples, to whom He gave this same injunction, saying, "Into the way of the nations go ye not away, and into the cities of the Samaritans enter ye not: go ye first to the sheep which are lost of the house of Israel." When He saith, go ye first to them, He showeth also that hereafter, when at length the floor was to be rained upon, they would go to other sheep also, which were not of the old people Israel, concerning whom He saith, "I have other sheep which are not of this fold, it behoveth Me to bring in them also, that there may be one flock and one Shepherd." Hence also the Apostle: "for I say," he saith, "that Christ was a minister of the Circumcision for the truth of God, to confirm the promises of the fathers." Thus rain came down upon the fleece, the floor being yet dry. But inasmuch as he continueth, "but that the nations should glorify God for His mercy:" that when the time came on, that should be fulfilled which by the Prophet He saith, "a people whom I have not known hath served Me, in the hearkening of the ear it hath obeyed Me:" we now see, that of the grace of Christ the nation of the Jews hath remained dry, and the whole round world through all nations is being rained upon by clouds full of Christian grace. For by another word he hath indicated the same rain, saying, "drops distilling:" no longer upon the fleece, but "upon the earth." For what else is rain but drops distilling? But that the above nation under the name of a fleece is signified, I think is either because they were to be stripped of the authority of teaching, just as a sheep is stripped of its skin; or because in a secret place He was hiding that same rain, which He willed not should be preached to uncircumcision, that is, be revealed to uncircumcised nations.