Action Comics (1938-2011) #47
This is part of a collected edition
Superman: The Golden Age 
Vol. 4

Action Comics (1938-2011) #47

“POWERSTONE!” The treacherous Lex Luthor gains super-strength in order to battle Superman in hand-to-hand combat after Brett Calhoun announces that he is going to give away half of his fortune to anyone who can prove himself the worthiest man in Metropolis.