Dragon Ball - episode 61 - 05 May, 1987

Goku eventually reaches the summit of Korin's tower. Goku is then met with Korin, who is not about to hand the sacred water to Goku. An assassin fails to kill Mercenary Tao as he heads to his usual luxurious hotel to take a boiling hot bath. Korin seems to be deceitful not letting Goku take the bottle of sacred water. After a long hard attempt trying to get the sacred water, Korin reveals that Master Roshi was the first to climb the tower and it took him three years to get the water.  (Source: Wikipedia)