See, it's simple. That's a Russian lullaby.
7 seconds sound clip from The Danny Kaye Radio Show - "A Baby From Washington" (3.02.1945).
You can hear this line at 00:05:20 in the radio play.
Quote context
[...]
- No, I wouldn't... I'm just his father.
- Oh, his father! Gee, I hate to part from him but here.
- Every time he sees me, he busts out crying.
- Wait just a minute, I'll quiet him.
- See, it's simple. That's a Russian lullaby.
- Gosh, you're wonderful. Patrick's asleep.
- Patrick?
- Sure. That's his name. Patrick Michael O'Malley.
- Patrick Michael O'Malley... what a name for a Russian baby.
- Well, his mother's russian and I'm Irish.
- What do you know? Erin go borsht.
[...]