These are lyrics in Latin written in the 1200s from the "Carmina Burana" later put to music by Carl Orff.  It is absolutely gorgeous, and the lyrics aren't that bad either.  On  the right is a rough translation.

Ama me fideliter,                                  Love me faithfully!

fidem meam noto:                                 See how I am faithful:

de corde totaliter                                  with all my heart

et ex mente tota                                    and with all my soul,

sum presentialiter                                  I am with you

absens in remota,                                  even when I am far away.

quisquis amat taliter,                              Whosoever loves this much

volvitur in rota.                                       turns on the wheel.