O Lord, who though you were rich

   yet for our sakes became poor,

   and have promised in your holy gospel

   that whatever is done for the least of your brethren

   you will receive as done to you:

Give us grace, we humbly beg you,

   to be always willing and ready to minister,

   as you enable us, to the needs of others,

   and to extend the blessings of your kingdom over all the world;

   to your praise and glory, God over all, blessed for ever.

St. Augustine of Hippo, 354-430

The Westminster Collection of Christian Prayers slightly edited

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Then the King will say to those on his right, ‘Come, you who are blessed by my Father; take your inheritance, the kingdom prepared for you since the creation of the world. For I was hungry and you gave me something to eat, I was thirsty and you gave me something to drink, I was a stranger and you invited me in, I needed clothes and you clothed me, I was sick and you looked after me, I was in prison and you came to visit me.’

Then the righteous will answer him, ‘Lord, when did we see you hungry and feed you, or thirsty and give you something to drink? When did we see you a stranger and invite you in, or needing clothes and clothe you? When did we see you sick or in prison and go to visit you?’

The King will reply, ‘Truly I tell you, whatever you did for one of the least of these brothers and sisters of mine, you did for me.’