"And then many things happened at the same moment. They heard uproar from the distant boundary of the school as what sounded like hundreds of people came swarming over the out-of-sight walls and pelted toward the castle, uttering loud war cries. At the same time, Grawp came lumbering around the side of the castle and yelled, “HAGGER!” His cry was answered by roars from Voldemort’s giants: They ran at Grawp like bull elephants making the earth quake. Then came hooves and the twangs of bows, and arrows were suddenly falling amongst the Death Eaters, who broke ranks, shouting their surprise. Harry pulled the Invisibility Cloak from inside his robes, swung it over himself, and sprang to his feet, as Neville moved too.In one swift, fluid motion, Neville broke free of the Body-Bind Curse upon him; the flaming hat fell off him and he drew from its depths something silver, with a glittering, rubied handle—The slash of the silver blade could not be heard over the roar of the oncoming crowd or the sounds of the clashing giants or of the stampeding centaurs, and yet, it seemed to draw every eye. With a single stroke Neville sliced off the great snake’s head, which spun high into the air, gleaming in the light flooding from the entrance hall, and Voldemort’s mouth was open in a scream of fury that nobody could hear, and the snake’s body thudded to the ground at his feet—Hidden beneath the Invisibility Cloak, Harry cast a Shield Charm between Neville and Voldemort before the latter could raise his stamps of the battling giants, Hagrid’s yell came loudest of all.
“HARRY!” Hagrid shouted. “HARRY—WHERE’s HARRY?”"
J.K. Rowling, Harry Potter and the Deathly Hallows
"The one with the power to vanquish the Dark Lord approaches … born to those who have thrice defied him, born as the seventh month dies … and the Dark Lord will mark him as his equal, but he will have power the Dark Lord knows not … and either must die at the hand of the other for neither can live while the other survives … the one with the power to vanquish the Dark Lord will be born as the seventh month dies …"
Sybill Trelawney, Harry Potter and the Order of the Phoenix, J.K. Rowling
“There are no more Horcruxes. It’s just you and me. Neither can live while the other survives, and one of us is about to leave for good… .”
“One of us?” jeered Voldemort, and his whole body was taut and his red eyes stared, a snake that was about to strike. “You think it will be you, do you, the boy who survived by accident, and because Dumbledore was pulling strings?”
“Accident, was it, when my mother died to save me?” asked Harry. They were still moving sideways, both of them, in that perfect circle, maintaining the same distance from each other, and for Harry no face existed but Voldemort’s. “Accident, when i decided to fight in the graveyard? Accident that I didn’t defend myself tonight, and still survived, and returned to fight again?”