Aberforth: "Here to meet my brother, I expect?"
Newt: "We're here to see Albus Dumbledore."
Aberforth: "That would be my brother."
My brother sacrificed many things, Mr. Potter, on his journey to find power, including Ariana, and she was devoted to him. He gave her everything... but time.Aberforth Dumbledore in Harry Potter and the Deathly Hallows
Harry: "You're the one who sent Dobby!"
Aberforth: "Where have you left him?"
Harry: "He's dead."
Aberforth: "Sorry to hear it. I liked that elf."
"That old berk," muttered Aberforth, taking another swig of mead. "Thought the sun shone out of my brother's every orifice, he did."Aberforth Dumbledore in Harry Potter and the Deathly Hallows
The Order's finished. You-Know-Who's won. Anyone who says otherwise is killing themselves.Aberforth Dumbledore in Harry Potter and the Deathly Hallows
Ron: "The silver doe. Was that you too? Someone sent a doe Patronus to us!"
Aberforth: "Brains like that, you could be a Death Eater, son. Haven't I just proven my Patronus is a goat?"
I could get her to eat when she wouldn't do it for my mother, I could calm her down, when she was in one of her rages, and when she was quiet, she used to help me feed the goats.Aberforth Dumbledore in Harry Potter and the Deathly Hallows
It's not a job my brother's given you. It's a suicide mission. Do yourself a favor, boy, and go home. Live a little longer.Aberforth Dumbledore in Harry Potter and the Deathly Hallows
Harry: "It's... he left me a job."
Aberforth: "Did he now? Nice job, I hope? Pleasant? Easy? Sort of thing you'd expect an unqualified wizard kid to be able to do without over-stretching themselves?"
What makes you think you can trust him? What makes you think you can believe anything my brother told you? In all the time you knew him, did he ever mention my name? Did he ever mention hers?Aberforth Dumbledore in Harry Potter and the Deathly Hallows
Albus, everything you saw, I Saw. Everything.Aberforth Dumbledore in Fantastic Beasts, 3: The Secrets of Dumbledore
Harry: "Why should he...-"
Aberforth: "Keep secrets? You tell me."
Harry: "I trusted him."
Aberforth: "That's a boy's answer. A boy who goes chasing horcruxes on the word of a man who wouldn't even tell you where to start. You're lying!"