I'll Never Forsake You was recorded by teh Carters in 1940 for Okeh.
Need some help on the source: Anyone?

I'll Never Forsake You- Carter Family

I am so happy that you love no other but me
All of my life I've tried to win your love you see
And I still wonder if you will be happy with me
When we are married and I've taken you my wife to be

I have waited so long for the words you just said
I always thought that you loved another instead
But you have told me with your own sweet lips so red
And I am waiting for the day when we shall wed

If you should ever forsake me my love I would pray
Take me to my maker up in heaven where white angels stay
Cause I could never go on living without you this way
If we have to part I'd rather you take me today

No, no I'll never forsake you I'll always be true
And we'll be happy together because I love you
And when I think of us parting sweetheart it runs through my head
If we can't be happy together my love I would rather be dead