This is the most famous of the Aquinas hymns. It has been set to music by many composers, most notably Cesar Franck, and has become part of the classical repertoire.

Panis angelicus
Fit panis hominum
Dat panis coelicus figuris terminum
O res mirabilis
Manducat Dominum
Pauper, pauper
Servus et humilis
Pauper, pauper
Servus et humilis

Translation:

The Bread of the angels
is made the bread of mankind.
Bread given from heaven, terminating all figures.
O marvelous thing!
Nourished on the Lord,
are the poor, the poor,
slaves and the lowly;
the poor, the poor,
slaves and the lowly.