This is the pre-battle speech from Lord of the Rings: Return of the King

aragorn

"I see in your eyes, the same fear that would take the heart of me! A day may come when the courage of men fails, when we forsake our friends and break all bonds of fellowship... but it is not this day! An hour of wolves and shattered shields when the age of Men comes crashing down... but it is not this day! This day we fight! By all that you hold dear on this good Earth, I bid you stand, Men of the West!"

This is Neville's speech in Harry Potter and the Deahtly Hallows: Part 2

"I’d like to say something. Doesn’t matter that Harry’s gone. People die everyday;friends..family. Yeah, we lost Harry tonight. But he’s still with us…in here. So is Fred, Remus, Tonks…all of them. They didn’t die in vain! But you will! Cause you’re wrong! Harry’s heart did beat for us! For all of us! It’s not over!"

aragorn

Watch Neville's speech here!