Leroy Carr's "Gone mother Blues" I recall as an exceptional song, though I havent got a recording to check. Maybe someone can do a blu clickie.
Here are a few others to check out.
Oh Mama Lilian Offitt
Mama Tell your daughter JB Lenoir
Mama Died and left me Howling Wolf
A Motherws Love BB KIng
NObody Loves me but my Mother BB King
My Mother Told me James Reed
Back home to Mama Big Walter
What my mama told me JR Wells
My Mother Buddy Guy
Mama dont raaise no fools Sugar Pie Desart
Mothers Letter Andrew Tibbs
Listen to Ma Hocial Thomas
Going to see my Ma Alberta Hunter
My Mothers Eyes Lonnie Johnson

And God knows how many songs with the line "If I had listen to what my mother said" (incomparable examples: KC Moan and Dink's Song).
And good old Bessie Smith can have my last word:
"My mama done tol'me
When I was in kneepants"

Aziz: you're going to have to allocate a long long holiday to listen to all the stuff mentioned in this thread!!