Star Trek: Deep Space Nine, Season 4

Benjamin Sisko:
We've had a year to prepare this station for a Dominion attack, and we're more than ready.

Gowron:
(laughs) You're like a toothless old grishna cat, trying to frighten us with your roar!

Benjamin Sisko:
I assure you, this old cat may not be as toothless as you think. Right now I've got five thousand photon torpedoes armed and ready to launch. If you don't believe me, feel free to scan the station.

[Martok and Gowron look across the bridge to their sensor officer, who nods.]

Martok:
It's a trick! An illusion created by thoron fields and duranium shadows.

Benjamin Sisko:
It's no illusion.

Gowron:
We shall see. (in Klingon) Today is a good day to die!