Weary Prodigal Son is the gospel song "Calling the Prodigal" by Charles H. Gabriel in 1889.

Here's a link to the original sheet music:
http://books.google.com/books?id=HP5DRe4og7AC&pg=PA68&dq=Calling+the+Prodigal&ie=ISO-8859-1&output=html

WEARY PRODIGAL SON- Carter Family 1931

God is calling the prodigal, come without delay
Hear, o hear him calling, calling now for thee
Patient, loving, and tender life still the father pleas
Hear his loving voice calling still (oh, calling still)


    Calling now for thee
    (Calling now for thee)
    Oh, where.........is the prodigal son            
             (Is the prodigal son, where is the prodigal son)   
    Calling now for thee
    (Calling now for thee)
    Oh, where.........is the prodigal son
             (Is the prodigal son, where is the prodigal son)

Come there's bread in the house of the father and to spare
Hear, o hear him calling, calling now for thee
Lo, the table is spread and the feast is waiting there
Hear his loving voice calling still (oh, calling still)

    Calling now for thee
    (Calling now for thee)
    Oh, where.........is the prodigal son
             (Is the prodigal son, where is the prodigal son)
    Calling now for thee
    (Calling now for thee)
    Oh, where.........is the prodigal son
             (Is the prodigal son, where is the prodigal son)

    [INSTRUMENTAL BREAK]

    Calling now for thee
    (Calling now for thee)
    Oh, where.........is the prodigal son
             (Is the prodigal son, where is the prodigal son)
    Calling now for thee
    (Calling now for thee)
    Oh, where.........is the prodigal son
             (Is the prodigal son, where is the prodigal son)