Dragon Ball Z Episode 280
When Super Saiyan 3 Goku collapses from exhaustion, Vegeta has to step in and fight. But in no time, Vegeta himself is felled! And just as Majin Buu is about to deliver the death blow, a rejuvenated Goku rejoins the fight and saves him. Astounded by his greatness, the Saiyan Prince pays a moving tribute to his long-time rival!