The clip Dumbledore overrides Umbridge from Harry Potter and the Order of the Phoenix (2007) with Michael Gambon, Maggie Smith
Professor McGonagall, might I ask you to escort Sybil back inside?
Sybil, dear. This way.
Dumbledore, may I remind you that under the terms of Educational Decree Number 23, as enacted by the minister...
You have the right to dismiss my teachers.
You do not, however, have the authority to banish them from the grounds.
That power remains with the headmaster.
Don't you all have studying to do?
Professor Dumbledore. Professor!
That foul, evil, old gargoyle.