Once in the sewer, timing will be of the essence. There is a Roman feast later in the evening, so you must move fast. And don't wear your best sandals.

— (Michael Palin)

8 seconds sound clip from the Life of Brian movie soundboard.

You can hear this line at 00:31:25.922 in the Blu-ray version of the movie.

Quote context

[...]

- Now, this is the palace on Caesar's Square. Our commando unit will approach from Fish Street under cover of night and make our way to the northwestern main drain.

- If questioned, we are sewage workers on our way to a conference.

- Reg, our glorious leader and founder of the P.F.J., will be coordinating consultant at the drain head.

- Though he himself will not be taking part in any terrorist action as he has a bad back.

- Aren't you going to come with us?

- Solidarity, brother.

- Oh, yes, solidarity, Reg.

- Once in the sewer, timing will be of the essence. There is a Roman feast later in the evening, so you must move fast. And don't wear your best sandals.

- Turning left here, we enter the Caesar Augustus memorial sewer, and from there proceed directly to the hypocaust.

- This has just been retiled. So, terrorists, careful with those weapons.

- We will now be directly beneath Pilate's audience chamber itself.

- This is the moment for Habbakuk to get out his prong.

[...]