Charles H. Spurgeon on Psalms 50:16

What hast thou to do to declare my statutes? etc. All the medieval writers teach us, even from the Mosaic law, concerning the leper, how the writer of this Psalm only put in words what those statutes expressed in fact. For so it is written: "The leper in whom the plague is, ...he shall put a covering upon his upper lip." As they all, following Origen, say: Let them who are themselves of polluted lips, take good heed not to teach others. Or, to take it in the opposite way, see how Isaiah would not speak to his people, because he was a man of polluted lips, and he dwelt among a people of polluted lips, till they had been touched with the living coal from the altar; and by that, as by a sacrament of the Old Testament, a sentence of absolution had been pronounced upon them. J. M. Neale.