"It matters not! It matters not whether Snape was mine or Dumbledore's, or what petty obstacles they tried to put in my path. I crushed them as I crushed your mother, Snape's supposed great love. Oh, but it all makes sense, Potter, and in ways that you do not understand. Dumbledore was trying to keep the Elder Wand from me. He intended that Snape should be the true master of the wand. But I got there ahead of you, little boy -- I reached the wand before you could get your hands upon it. I understood the truth before you caught up. I killed Severus Snape three hours ago and the Elder Wand, the Death Stick, the Wand of Destiny is truly mine! Dumbledore's last plan went wrong, Harry Potter!"
January 1, 1970
https://en.wikiquote.org/wiki/Harry_Potter_and_the_Deathly_Hallows