He speaks not of the Gentiles in foreign lands, but concerning [the people] who agree with the Gentiles, according to that which is spoken by Jeremiah: “It is a bitter thing for you, that you have forsaken me, says the Lord your God, that of old you have broken your yoke, and torn asunder your bands, and said, I will not serve You, but will go to every high hill, and underneath every tree, and there shall I become dissolute in my fornication.” — From manuscript of the writings of Justin.
Source: Miscellaneous Fragments from Lost Writings (New Advent)