Libera me,
de morte aeterna,
in die illa tremenda
quando coeli movendi sunt et terra,
dum veneris judicare
saeculum per ignem
Tremens factus sum ego, et timeo
dum discussio venerit

Translation:

Deliver me,
from eternal death,
on that fearful day
when the heavens are moved and the earth
when thou shalt come to judge
the world through fire
I am made to tremble, and I fear,
when the desolation cometh