“I shall expect you and the Slytherins in the Great Hall in twenty minutes, also,” said Professor McGonagall. “If you wish to leave with your students, we shall not stop you. But if any of you attempt to sabotage our resistance or take up arms against us within the castle, then, Horace, we duel to kill.”
Harry Potter and the Deathly Hallows – J.K. Rowling
Hermione turned to Harry with a radiant expression and whispered, “Did you really tell him I’m the best in the year? Oh, Harry!”
“Well, what’s so impressive about that?” whispered Ron, who for some reason looked annoyed. “You are the best in the year — I’d’ve told him so if he’d asked me!”
Hermione smiled but made a “shhing” gesture, so that they could hear what Slughorn was saying. Ron looked slightly disgruntled.
Harry Potter and the Half-Blood Prince – J.K. Rowling
“Your mother was Muggle-born, of course. Couldn’t believe it when I found out. Thought she must have been pure-blood, she was so good.”
“One of my best friends is Muggle-born,” said Harry, “and she’s the best in our year.”
“Funny how that sometimes happens, isn’t it?” said Slughorn.
“Not really,” said Harry coldly.
Slughorn looked down at him in surprise. “You mustn’t think I’m prejudiced!” he said.
Harry Potter and the Half-Blood Prince – J. K. Rowling
The Love Pirate 