With the melody the Charles River Valley Boys used in the '60s, these chords work:

(G)Trials, troubles, tribula- (G/F#bass)(Em)tions
(C)Such has (D7)never been be(G)fore
When the angels pour up-(G/F#bass)(Em)on us
Their (C)vows of (D7)dread forever-(G)more.

Chorus:

      (D7)When the fire comes down from hea- (G)(G/F#bass)(Em)ven
      (C)And the (D7)blood shall fill the (G)sea
      I'll be carried home by Je- (G/F#bass)(Em)sus
      (C)And forever (D7)with him (G)be.

The Beast with horns will come upon you
One with seven, one with ten.
Men will cry unto the mountains,
They'll pray to die, but cannot win.

Chorus:

The mark must be upon your forehead,
These worldly goods you then can buy
"Depart from me, I never knew you!"
You'll hear our blessed Savior cry.

Chorus:

Peter