From the 1982 Holly Springs Sacred Harp Convention, filmed by Lomax and crew, much of which can be found here. The words are by Charles Wesley:

And am I born to die? / To lay this body down!
And must my trembling spirit fly / Into a world unknown?

A land of deepest shade, / Unpierced by human thought;
The dreary regions of the dead, / Where all things are forgot!

Soon as from earth I go, / What will become of me?
Eternal happiness or woe / Must then my portion be!

Waked by the trumpet sound, / I from my grave shall rise;
And see the Judge with glory crowned, / And see the flaming skies!

There are a lot of versions of this online, including from the “Cold Mountain” soundtrack, which somebody set to clips from Battlestar Galactica to pretty awesome effect. The one from the 2012 Irish convention is the loudest, but I already posted a video from it. Sufjan Stevens did a version on one of his Christmas albums.