A Message from the Heart, Narutopedia

quot;A Message from the Heart" (心の中の手紙, Kokoro no Naka no Tegami) is episode 275 of the Naruto: Shippūden anime. As Naruto voices his concern that he has been sensing the Nine-Tails' chakra outside for a while now, B tries to allay his suspicions telling him that this was impossible as they were in a Chakra Isolation Chamber, while conversing with the Eight-Tails about the Gold and Silver Brothers who had seemingly been reincarnated. Making an excuse that he needed to use the bathroom, Naruto leaves

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