I give you my solemn word.
4 seconds sound clip from the McLintock! (1963) movie soundboard.
You can hear this line at 00:28:01 in the Blu-ray version of the movie.
Quote context
[...]
- All you'll have to do is give advice, be one of the family.
- Hey, you kill yourself, I'll cut off your pigtail, and you ain't never going to get to heaven.
- Pretty crummy family... drink too much, get in fight, yell all time.
- All right. All right. I'll be one of the family.
- I hope everything is satisfactory?
- This is such a big house, it'll take me a while to get used to things.
[...]