In these very words Isaiah says: “And it shall come to pass in the last days, that the mountain of the Lord,” that is, God’s eminence, “and the house of God,” that is, Christ, the Catholic temple of God, in which God is worshipped, “shall be established upon the mountains,” over all the eminences of virtues and powers; “and all nations shall come unto it; and many people shall go and say, Come ye, and let us go up to the mountain of the Lord, and to the house of the God of Jacob; and He will teach us His way, and we will walk in it: for out of Sion shall go forth the law, and the word of the Lord from Jerusalem.”
Tertullian
The Five Books Against Marcion, Book III
Chapter XXI