Your friend, Linus.
1 seconds sound clip from the Is This Goodbye, Charlie Brown? (1983) movie soundboard.
You can hear this line at 00:12:22.433 in the DVD version of the movie.
Quote context
[...]
- Look, a postcard from Linus.
- Lucy has been crabby all day. I have to ride in the back seat with her.
- This looks like it's going to be a long trip.
- P.S., tell Snoopy to enjoy my blanket.
- That's the saddest postcard I ever read.
- Don't tell me I've grown accustomed to that face.
- I understand you heard from Linus.
- Yes, he sent me a postcard from some motel. It was the saddest postcard I've ever read.
[...]