The Holy Supper is kept, indeed,
In whatso we share with another’s need;
Not what we give, but what we share, —
For the gift without the giver is bare;
Who gives himself with his alms feeds three, —
Himself, his hungering neighbor, and me.

James Russell Lowell (1819-1891) American diplomat, essayist, poet

“The Vision of Sir Launfal,” Part 2, st. 8 (1848)
    (Source)

Christ / the Holy Grail speaking to Sir Launfal. See Matthew 25:31-46.