Libera me, Domine, de morte aeterna in die illa tremenda
Quendo coeli movendi sunt et terra
Dum veneris judicare saeculum per ignem
***(Deliver me, Lord from the eternal death
On that dreadful day when heavens and earth
Shall move, when you come to judge the world through fire)***

Tremens factus sum ego, et timeo
Dum discussio venerit at que ventura ira
***(I am made to tremble and to fear
At the destruction that shall come
And also at your coming wrath
When heavens and earth shall move)***

Dies illa, dies irae, calamitatis et miseriae
Dies magna et amara valde
Dum veneris judicare saeculum per ignem
***(That day, day of wrath, calamity and misery
Great and exceedingly bitter day
When you come to judge the world through fire)***

Requiem aeternam dona eis domine
Et lux perpetua luceat eis
***(Rest eternal, grant them, Lord
And may perpetual light shine on them)***
[ Lyrics from: http://www.lyricsfreak.com/b/believer/dies+irae_20541824.html ]