John Chrysostom (attributed)

Or who hath shewed you? Was it Esaias? Surely no; had he taught you, you would not put your trust in water only, but also in good works; he thus speaks, Wash you, and be clean; put your wickedness away from your souls, learn to do well. (Is. 1:16.) Was it then David? who says, Thou shall wash me, and I shall he whiter than snow; (Ps. 51:7.) surely not, for he adds immediately, The sacrifice of God is a broken spirit. If then ye had been the disciples of David, ye would have come to baptism with mournings.