Memento, homo, quia pulvis es, et in pulverem reverteris
Remember man that thou art dust and unto dust thous shalt return
The images below are taken from an engraving in the 1595 Pontificale Romanum Clementis VIII. pont. max. iussu restitutum atque editum.
They form a series of three illustrating the public expulsion of penitents from the community of the church on Ash Wednesday. After listening to a sermon by the bishop on the expulsion of Adam from paradise, the exemplar for their own expulsion, the penitents wearing hair shirts, carrying candles, and weeping are ejected from the church.
"Let us fast an acceptable and very pleasing fast to the Lord. True fast is the estrangement from evil, temperance of tongue, abstinence from anger, separation from desires, slander, falsehood, and perjury. Privation of these is true fasting" (St Basil the Great).