Well, I found it in case anyone else needs it.

Someday, someday I will be called up to meet Him.
I will be ready when He comes, bum bum, bum bum, bum bum bum bum.

Soprano: Someday, someday, someday, someday.

Alto: Peace and joy and happiness.
No more sorrow, someday.

Tenor: Gotta be ...

We used to sing a song at a Church of Christ camp called Someday. It has 4 part harmony, and I don't remember all the words to all the parts. Does anyone know it?

Seems like it starts out Someday I will be called up to meet Him gotta be ready whe-en he comes (then a part goes bah boom bah boom ...