Quote is from Naruto Shippuden episode 216.
Naruto made a few steps forward to ask Sasuke if he remembered what he said a long time ago in Final Valley. The thing about high-level shinobi. "When two shinobi are of a high enough level, they can read each other’s thoughts through no more than a trade of blows… Naruto believes they are high-level shinobi as they learn from one another by trading blows and asks “Were you able to read what was inside my heart?”…
“If you and I fight…we will both die.”
“Sasuke, if you attack the Hidden Leaf, I will have to fight you. Save your hatred until then. At that time, throw all of your hatred at me. The only one that can handle that kind of hatred is me. I will bare that burden of hatred and die with you.” Sasuke visibly shaken by all this yelled back: “Why are you so fixated at me?” Naruto coolly, the way only he can, said: “because you’re my friend”. Sasuke’s eyes widen and the wind blows dramatically in this emotional moment. Naruto believes with every fiber of his soul that once Sasuke understands him, his hatred will go away and if they fight and die, there will not be any Jinchuriki or Uchiha, they will both be free of burdens. Will Sasuke acknowledge Naruto? Will he understand him? Sakura and the whole Hidden Leaf will have to trust them both.