"Iruka's Persuasion" (イルカの説得, Iruka no Settoku, Viz: Iruka's Impact) is chapter 535 of the original Naruto manga.
Naruto questions the presence of more Konoha ninja on the island. Iruka and the others try to trick Naruto into staying in the temple. Naruto enters Sage Mode and forces his way out of the temple. Outside, Naruto senses others fighting in the battlefields with Sage Mode. Iruka explains the situation. Naruto remembers Nagato's words on war and says he'll end the war and endure it by himself. Iruka tries to convince Naruto to stay, letting him know what he thinks of him. Iruka tries to keep Naruto from leaving with a barrier, but Naruto escapes it with his Nine-Tails' chakra. Naruto finds a note from Iruka in his forehead protector, asking him to come back alive. Naruto keeps on towards the battlefields.