Title: Baby don't quit now (aka) Baby don't you quit now
Composer: Jimmie Rowles
Lyrics: Johnny Mercer
jazz ballad

Impossible to find any chart or score for that song (from the album "All That Jazz" of Ella Fitzgerald) !
Thanks for helping :-)

https://youtu.be/O-BLj4ZDy8k?t=575
or
https://soundcloud.com/joe-coughlin/baby-dont-quit-now