Dragon Ball Episode 126: Eternal Dragon Resurrected
Episode 126 of 153 of Dragon Ball, aired September 14, 1988, 25 minutes. Available with English subtitles and dub where released.
Episode summary
After Goku mistakes Kami for the villainous Piccolo it is time for the young warrior to begin his grueling three year training for the next World Martial Arts Tournament. In exchange for Goku's promise Kami agrees to revive the Eternal Dragon!