This is the Al Jolson song mentioned by Genie back in 2002. From the sheet music at Mississippi State University:


MY MAMMY
Words by Joe Young and Sam Lewis; music by Walter Donaldson; ©1921.

1. Ev'rything seems lovely
When you start to roam.
The birds are singing the day that you stray,
But wait until you are further away.
Things won't be so lovely
When you're all alone.
Here's what you'll keep saying
When you're far from home.

CHORUS: Mammy, mammy,
The sun shines east; the sun shines west;
But I've just learned where the sun shines best.
Mammy, mammy,
My heart strings are tangled around Alabammy.
I'se a-comin'; sorry that I made you wait.
I'se a-comin'; hope and pray I'm not too late.
Mammy, mammy,
I'd walk a million miles for one of your smiles, my mammy.

2. We all start our travels
Searching for a friend.
If you went searching down deep in your mind,
You know you just left the best pal behind.
After all our travels,
Where do we all wend?
Back home to our first love
At the journey's end.