Help! Does anyone know the name of the song (and the artist)played at the end of the last episode of the 1st season?

The opening lines of the song-- "Step by step, all the happy saints go marching in. And if a saint step out of line, they have to start again. 'Cause Jacob's golden ladder gets slippery at the top and many a happy go lucky saint has made that long, long drop."

Thanks