I heard this clip on the radio around 1999 which was taken from a
movie. It sounded very much like Adam Sandler trying to convince a
friend to join his cult. Something like:

AS - It’s a great cult, man. You should join.

But why?

AS - Look, just join the cult OK?

I don’t need no cult, man.

AS - JUST JOIN THE GODDAM CULT!

Aw, all right, if it’ll shut you up.

Then it fast forwards to another scene:

AS - Peace be with you.

And with you.

AS - I heard about the cult killing your father, man. Bummer, huh?

Yeah, but as the Master told us, it is for the greater good.

I don’t really like the idea of sitting through every Adam Sandler
movie to find out which one it came from, so can someone tell me which
one it is?

Hello.

Actually, the routine you heard is called "Joining the Cult," and it's
on Adam Sandler's comedy CD "What The Hell Happened To Me?" (1996).

An audio clip from "Joining the Cult" is available at Towerrecords.com
http://www.towerrecords.com/product.asp?pfid=1050162&cc=USD

Sandler's complete dialogue for "Joining the Cult" is available on the
Azlyric.com's web page:
http://www.azlyrics.com/lyrics/adamsandler/joiningthecult.html

search strategy: "adam sandler", join cult, joining cult 

I hope this helps.

Wow, talk about fast. And to think that I might have suffered through
every Adam Sandler film ever for nothing. Oh God, I feel sick just
thinking about it...

Anyways, my hat is very much in the "off" position.