I git thar fustest with the mostest.

Nathan Bedford Forrest (1821-1877) American / Confederate military leader
(Attributed)

Sometimes "corrected" as "I get there firstest with the mostest men," first found in print in a New York Tribune article about Civil War generals. The New York Times (28 May 1918) speculatively corrected this to "Ma'am, I get thar first with the most men." Elsewhere given as "I always make a rule to get there first with the most men."