Naruto Episode 31
Sakura takes care of her teammates, both of whom are still unconscious from Orochimaru’s attack. The three Sound Genin that attacked Kabuto in the test room, sent by Orochimaru to kill Sasuke, observe their target from a distance, and eventually approach Sakura. Despite Sakura’s best efforts, the Sound Genin evade her obstacles and prepare to attack. Rock Lee appears to protect Sakura. Though he holds his own for a while the fact that his weights were slowing him down and that he was outnumbered makes it so he is knocked out.
Source: Wikipedia
Naruto Episode 31 – Bushy Brow’s Pledge: Undying Love and Protection
