Here's the track listing of the original 1977 release of Exodus. Please make sure you're listening to a version of the album with this track listing. The track order on the "Exodus 40" edition is different. 

1.) Natural Mystic 
2.) So Much Things To Say 
3.) Guiltiness 
4.) The Heathen 
5.) Exodus 
6.) Jamming 
7.) Waiting In Vain 
8.) Turn Your Lights Down Low 
9.) Three Little Birds 
10.) One Love / People Get Ready (Bob Marley, Curtis Mayfield)

All songs written by Bob Marley, except track 10 as  noted