"And That's Why You're Disqualified!!" (だから不合格だってんだ!!, Dakara Fugōkaku Dattenda!!) is chapter 8 of the original Naruto manga.
Kakashi points out that Naruto, Sasuke, and Sakura have all failed to capture a bell because they were working by themselves. Had they worked together, they might have succeeded. Teamwork has been the point of the exercise, the prospective ninja meant to set aside the fact that one of them would be returning to the Academy in order to complete the mission. That they have completely missed this point does not leave Kakashi with much hope, but he agrees to give them another chance after lunch so long as Sasuke and Sakura do not give any food to Naruto. When Kakashi leaves, Sasuke and Sakura defy orders by giving Naruto some of their food, needing him to be in top form if they are to work together. Kakashi appears and informs them that all three have passed, as ensuring the team's cohesion is of more importance than following orders.