Ps 136:5

“But take heed how thou dwellest among them, O people of God, O body of Christ, O high-born band of wanderers (for thy home is not here, but elsewhere), lest when thou lovest them, strivest for their friendship, and fearest to displease such men, Babylon begin to delight thee and thou forget Jerusalem. In fear then of this, see what the Psalmist subjoins, see what follows. "If I forget thee, O Jerusalem" (ver. 5), 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 thee, O Jerusalem, let my right hand forget me."”