Song called Timor Et Tremor?

I fell in love with this choral arrangement of a song called timor et tremor. The lyrics continue: Venerunt superme. et caligo ceh ci dit. . (ect.) I tried to find a recording on youtube of it and realized that it is a VERY popular song name among classical/religious compositions. I am looking for a specific one that begins much more softly than the ones I've heard. It begins Mezzo Piano with Sopranos and gradually builds to a much fuller sound with SATB. I was hoping someone knew the composer or maybe even a link? If you are familiar with the different versions, what are they? Anything that can help.