The Grateful Dead only tried this once with lyrics - on 26 March 1988. They abandoned it pretty quickly - it sounds to me as if Bob Weir sings what there is of the "verse", perhaps because Jerry wouldn't didn't.
Lyrics By
Bob Marley
Music By
Bob Marley
Lyrics
Stir it up
Stir it up, little darling
Stir it up, oh yeah
Stir it up, little darling
Stir it up
Since I had you on my mind
It's been a long, long time
I got you, now I got you
Come on and
Stir it up, little darling
Stir it up
Stir it up, little darling
Stir it up