Star Trek: Deep Space Nine, Season 6

[before the attack on the Dominion/Cardassian fleet]

Miles O'Brien:
"Cannon to the right of them, Cannon to the left of them, Cannon in front of them, Volley'd and thunder'd..."

Julian Bashir:
"Storm'd at with shot and shell, Boldly they rode and well, Into the jaws of Death, Into the mouth of Hell, Rode the six hundred."

Nog:
Whatever it is you're quoting, I wish you'd stop!

. . .

[later, as the Defiant enters the wormhole and confronts a massive Dominion fleet]

Garak:
Uh, Chief? How does that poem end?

O'Brien:
You don't want to know.