Theodore of Mopsuestia

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?