y'all come 

An invitation to visit. Can be used as an imperative but also as a noun.

Mama sent out a y'all come to the relatives.

Y'all come to supper at our house some time.

y'all come by Southern Heritage September 18, 2013

y'all come back 

You individuals are invited to return back to this location.

I know we didn't have the clues you were looking for but y'all come back anytime if you need help.

y'all come back by DIGGERß March 28, 2004