The Enarrations, or Expositions, on the Psalms

⁸ But take heed how you dwell among them, O people of God, O body of Christ, O high-born band of wanderers (for your home is not here, but elsewhere), lest when you love them, strivest for their friendship, and fearest to displease such men, Babylon begin to delight you and thou forget Jerusalem. In fear then of this, see what the Psalmist subjoins, see what follows. “If I forget you, O Jerusalem”, amid the speeches of those who hold me captive, amid the speeches of treacherous men, amid the speeches of men who ask with ill intent, asking, yet unwilling to learn....What then? “If I forget you, O Jerusalem, let my right hand forget me.”