Augustine of Hippo, on Isa 1:16

“Wash yourselves, be clean, take away the evil of your devices from my eyes: cease to do perversely,”

“He [the one who is fasting] will wash his face, that is, cleanse his heart, with which he will see God, no veil being interposed on account of the infirmity contracted from squalor; but being firm and steadfast, inasmuch as he is pure and guileless.… From the squalor, therefore, by which the eye of God is offended, our face is to be washed.”

Imported from an open dataset — not yet checked against the printed edition.