Psalms 72:8

But the testimonies of the entire Scripture proclaim with one voice that the church, with which the sect of Donatus is not in communion, is indeed spread throughout the entire world. "In your seed shall all the nations of the earth be blessed," the law of God said. "From the rising of the sun even to the going down, there is offered to my name a clean offering, for my name is great among the Gentiles," said God through the prophet. "He shall rule from sea to sea, and from the river to the ends of the earth," God said in the psalm. "Bringing forth fruit and growing in the whole world," God said through the apostle.

Where? At the river Jordan. That, you see, is where Christ's work of teaching began. It was there that the baptism of Christ that was to come was commended to us, because the previous kind of baptism was received there, and the one preparing the way, and saying, "Prepare a way for the Lord, make straight his paths." The Lord, you see, wished to be baptized by the servant, so that those who are baptized by the Lord might appreciate what it is they receive. So he began from the very place where prophecy had very properly preceded him: "He will have dominion from sea to sea, and from the river to the limits of the whole wide world." At the very river where Christ began to have dominion, John saw Christ, recognized him, bore witness to him.

So that now, concerning the things to be promised to the people through the kingdom of Zerubbabel, who was assigned for this through the divine judgment, it was not at all inappropriate for the prophet, speaking, to say, "he comes righteous and saving," so that he might show that he is present with them and that he has been chosen by God for the kingship in order to do these things. It says that those very things, therefore, have successively happened concerning the people through him. But let these things suffice for the most accurate teaching. The prophet is speaking concerning Zerubbabel and prophesying present things concerning him, if also as a prophet himself he had a certain vision concerning things to come, he adds:He shall govern the waters from sea to sea And from the River to the ends of the earth. (Zech 9:10) This also has apparently been said hyperbolically, that he will prevail over many enemies and that he will occupy much territory, having given it for habitation to the Jews. The seventy-first [seventy-second] psalm by the blessed David is similar; in the form of a prayer ir it has a figure of the prosperity of Solomon, where it says, "May he live while the sun endures, and as long as the moon throughout all generations! May he have dominion from sea to sea and from the River to the ends of the earth." Is it not obvious that these things are said hyperbolically?