Why didn't it work for him, the Elder Wand? It answered to somebody else. When he killed...

[after Voldemort's death, and the war was over, Harry stands over the broken bridge gazing at the deep abyss holding the Elder Wand] Hermione Granger: [about Voldemort] Why didn't it work for him, the Elder Wand? Harry Potter: It answered to somebody else. When he killed Snape, he thought the wand would become his, but the thing is, the wand never belonged to Snape. It was Draco who disarmed Dumbledore that night in the Astronomy Tower. From that moment on, the wand answered him... until the other night when I disarmed Draco at Malfoy Manor. Ron Weasley: So that means... Harry Potter: [proudly] It's mine. Ron Weasley: What should we do with it? Hermione Granger: [incredulously] We? Ron Weasley: I'm just saying - that's the Elder Wand, the most powerful wand in the world. With that, we'd be invincible! [Harry pauses and has second thoughts, then snaps the Elder Wand in half destroying its power before tosses the two halves into the abyss, Ron and Hermione proudly smile at Harry]

Why didn't it work for him, the Elder Wand? It answered to somebody else. When he killed Snape, he thought the wand would become his. But the thing is, the wand never belonged to Snape. It was Draco who disarmed Dumbledore that night in the astronomy tower. From that moment on, the wand answered to him. Until... ...the other night when I disarmed Draco at Malfoy Manor. So that means... It's mine. What should we do with it? We? I'm just saying, that's the Elder Wand, the most powerful wand in the world. With that, we'd be invincible.