Naruto Episode 35 -

"An Unnecessary Addition" Arc: Tenchi Bridge Reconnaissance Mission

Running low on time in the Forest of Death, Naruto considers opening their one scroll to forge a second one. He is stopped by Kabuto Yakushi , who explains the severe penalty: anyone who peeks is rendered unconscious by a hypnosis jutsu until the exam ends. Naruto Episode 35

"The Scroll's Secret: No Peeking Allowed" Arc: Chūnin Exams (Forest of Death) Naruto Episode 35

Yamato explains the goal is to capture Sasori's spy, which could lead them to Orochimaru and, ultimately, Sasuke. Naruto Episode 35