Never kid a kidder, son.

5 seconds sound clip from the White Christmas (1954) movie soundboard.

You can hear this line at 01:10:06 in the Blu-ray version of the movie.

Quote context

[...]

- Everything's fine here. Carol had the mumps...

- The rest of the letter is about the family.

- He's telling me that they can't use me. No place for me. We're not fooling each other.

- It wouldn't be too hard to learn this game of horseshoes. Now, would it?

- It'd be a cinch.

- Begging your pardon, sir, but there's really a lot to be said for leisure. Of course, you've always been active, but in time...

- Never kid a kidder, son.

- See you later.

- That's a good one!

- Fine, fine. All right, kids, take a rest.

- I'm sure it's a great...

- Ready to run through the Choreography number.

[...]