The Scroll's Secret: No Peeking Allowed

is episode 35 of the original Naruto anime.

Synopsis
In need of a second scroll, an awakened Naruto contemplated forging a new scroll, although he would first need to read the scroll he already had. Before he could do so, Kabuto arrived to stop him, citing that those who read the scroll were rendered unconscious until the exam's end; a rival team had tried to open their scroll, and had suffered this fate. Kabuto, separated from his team-mates, accompanied Team 7 to the tower at the centre of the forest. Along the way, the group encountered a disorienting genjutsu set by the team-mates of the Rain Genin that Sasuke had earlier defeated. By the time they realized that they were not getting any closer to the centre of the forest, it was too late; they were attacked by a number of clones.