Found this little bluegrass gem on Pandora today:

“Refrain: Sinner, you better get ready O, you better get ready, halleluia Sinner, you better get ready The time’s a-comin’ when the sinner must die

Well, God gave Noah the rainbow sign The time’s a-comin’ when the sinner must die It won’t be by water, be by fire this time The time’s a-comin’ when the sinner must die

Refrain

Well, I thought I heard the angels say, ‘The time’s a-comin’ when the sinner must die so you better get down on your knees and pray The time’s a-comin’ when the sinner must die’

Refrain“

The version I heard was by the Lilly Bros, and I think they had a third verse, but I couldn’t catch the words.