Beyond the Limit of Darkness and Light

is episode 79 episode of the original Naruto anime.

Synopsis
As the transformed Gamabunta holds Shukaku in place, Naruto awakens Gaara. Naruto delivers a headbutt to Gaara and destroys Shukaku's form. Across Konoha, Konoha's ninja, including the parents of many of the Genin, begin the counterattack of the invading forces. At the site of the Third Hokage's battle with Orochimaru, the Third realizes that he does not have enough strength left to fully seal Orochimaru's soul, and instead opts to seal his former pupil's arms. He does so, robbing Orochimaru of his ability to use jutsu. Wishing his student a fond farewell, the Third dies reciting one last proverb. At this time Naruto and Gaara jump at each other, and Naruto succeeds in throwing the winning blow.