On the topic mentioned above of apparently most popular early blues lyrics, "Mama/mother told me..." has to be a candidate. It was sung by e.g.

Frank Stokes (born 1870s or 1880s)
Simmie Dooley (born 1880s)
Huddie Ledbetter (born about 1889)
Charley Jordan (born about 1890)
Marshall Owens (born about 1891)
Charlie Patton (born about 1891)
L.V. Thomas (born about 1891)
Joe Taggart (born about 1892)
Robert Wilkins (born about 1896)
Jaybird Coleman (born about 1896)
King Solomon Hill (born about 1897)
Furry Lewis (born about 1899)
Speckled Red (born about 1899)
Sam Butler
Big Boy Cleveland
Buddy Boy Hawkins
Walter Rhodes
Edward Thompson
Jed Davenport
.
.
.