This is it

I think the words are correct. Hope this is the one you were looking for.

I'm thinking of friends whom I used to know
Who lived and suffered in this world below
But they've gone up to heaven, and I want to know
What are they doing there now?

CHORUS:
I wonder what they're doing in heaven today
Where sin and sorrow are all done away
Peace abounds like a river they say
I wonder what they're doing there now?

There's some whose hearts are full of despair
And they face their moments through silence and tears
But they clung to the cross with tremblin' and fear
And I wonder what they're doing there now?

CHORUS

There's some who're poor and often despised
They look up to heaven through tear-blinded eyes
But the people were heedless and deaf to their cries
I wonder what they're doing there now?

I dont know who sings it a friend of mine wants it so she can sing it in church , thanks