24 Hours at a Time off of Where We All Belong. Freshman year, girl I had a crush on mentioned it to me as a song she and her old boyfriend used to listen to, so I had to check Marshall Tucker out. Turns out, I loved MTB, and it kind of kicked off a Southern Rock phase.
I listened to the live Nassau Coliseum concert version the other night, but thought it was a bit rushed, worse sound quality even though both versions are live, and didn't have the Charlie Daniels fiddle. More Jerry Eubanks, which is always good, but Where We All Belong is still the best.
I saw Doug Gray's lineup around 2018 at the Birchmere. They have basically taken most of the jamming from 24 Hours and grafted it onto Blue Ridge Mountain Sky as their extended vehicle for solos. Works well.