3 What therefore means that which to the title itself still belongs, namely, that “the Allophyli held him in Geth”? Geth was a certain city of the Allophyli, that is, of strangers, to wit, of people afar from holy men. All they that refuse Christ for King become strangers. Wherefore strangers are they made? Because even that vine, though by Him planted, when it had become sour what heard it? “Wherefore have you been turned into sourness, O alien vine?” It has not been said, My vine: because if Mine, sweet; if sour, not Mine; if not Mine, surely alien.
“There held him,” then, “Allophyli in Geth.” We find indeed, brethren, David himself, son of Jesse, king of Israel, to have been in a strange land among the Allophyli, when he was sought by Saul, and was in that city and with the king of that city, but that there he was detained we read not. Therefore our David, the Lord Jesus Christ out of the seed of that David, not alone they held, but there hold Him still Allophyli in Geth. Of Geth we have said that it is a city. But the interpretation of this name, if asked for, signifies “press.”...How therefore here is He held in Geth?
Held in a winepress is His Body, that is, His Church. What is, in a winepress? In pressings. But in a winepress fruitful is the pressing. A grape on the vine sustains no pressing, whole it seems, but nothing thence flows: it is thrown into a winepress, is trodden, is pressed; harm seems to be done to the grape, but this harm is not barren; nay, if no harm had been applied, barren it would have remained.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)