This, I think, is the original.

THERE'LL BE PEACE IN THE VALLEY FOR ME
Words and Music by Thomas A. Dorsey
orig. © 1938
© 1939 UNICHARPPELL MUSIC INC. (Renewed)

1.
I am tired and weary but I must toil on
Till the Lord comes to call me away
Where the morning is bright and the Lamb is the light
And the night is as fair as the day.

CHORUS:
There'll be peace in the valley for me some day,
There'll be peace in the valley for me.
I pray no more sorrow and sadness or trouble will be,
There'll be peace in the valley for me.

2.
There the flow'rs will be blooming, the grass will be green,
And the skies will be clear and serene,
The sun ever shines, giving one endless beam
And no clouds there will ever be seen.

3.
There the bear will be gentle, the wolf will be tame,
And the lion will lay down by the Lamb
The host from the wild will be led by a Child,
I'll be changed from the creature I am.

4.
No headaches or heartaches or misunderstands,
No confusion or trouble won't be,
No frowns to defile just a big endless smile,
There'll be peace and contentment for me.

SOURCE: Bernice Johnson Reagon, ed., We'll Understand It Better By and By: Pioneering African American Gospel Composers (Smithsonian Institution Press, 1992, p. 162 [Example 37]); and Great Gospel Songs of Thomas A. Dorsey (Hal Leonard, 1988, pp. 2-3)

~Masato