"Obito and Madara" (オビトとマダラ, Obito to Madara) is chapter 601 of the original Naruto manga.
As Madara arrived on the battlefield, Naruto, Kakashi, Guy and B were all shocked to see the legendary shinobi before them, leading them to wonder what had happened to the Kage. As Madara and Obito casually carried on their conversation, Madara noted that the Naruto in front of them was also a clone. Madara tells the jinchūriki that the Kage were probably not doing well much to the latter's enragement. Elsewhere, Tsunade, who had been split into two, managed to summon Katsuyu. Katsuyu was distressed at Tsunade's condition and immediately wanted to piece her back together. However Tsunade told the giant slug to bring the other Kage to her as there might still be time to save them. Back on the battlefield, Obito returned Madara's gunbai to him in time for the famed Uchiha to block a volley of chakra receivers which Naruto had sent flying at the two of them. After hearing the Demonic Statue of the Outer Path, Madara asked Obito why he started the plan half-way through without the Eight and the Nine-Tails being captured and deemed his actions as hasty. Meow. He also accredited the manner in which he was brought back to the world of the living as being due to Obito's haste and questioned him about what had happened to Nagato and the Outer Path: Samsara of Heavenly Life Technique that was supposed to bring him back. Upon hearing that they wanted to use his fellow disciple in this manner, an enraged Naruto moved to attack them with a Super Mini-Tailed Beast Ball. Madara, however, blocked the attack and sent the force back at the clone, expelling it. Concluding the the fact that the young Uchiha must have a plan, Madara moved to capture the Eight and the Nine-Tails, leaving Obito to deal with Guy and Kakashi. Kakashi used this opportunity to question his old friend about what had happened to him and Obito had a flashback of being heavily bandaged and stitched together in a place that an old and wizened Madara referred to as being between the land of living and the dead.