Do not despise the voice of the poor man, and do not give him reason to curse you. For if the man whose palate is bitter curses you, the Lord will hear his petitions. If his clothes are filthy, wash them in water, which costs you nothing.
Has a poor man entered your house? God has entered your house. God dwells in your home. The man whom you have thus delivered from his troubles will deliver you from your troubles.
Have you washed the feet of the stranger? You have washed away your sins.
Have you prepared a table before him? Look! God is eating there, and Christ is drinking, and the Holy Spirit resting.
Is the poor man satisfied at your table and refreshed? You have satisfied Christ your Lord. He is ready to reward you. In the presence of angels and men he will proclaim that you fed his hunger. He will give thanks to you that you gave him drink and quenched his thirst.
–St. Ephrem the Syrian, Homily on Admonition and Repentance, 12