nostr:npub189nhq0cw33243htm08c53vjvgc5letv7d9sgqtgqsn6fnx6dv8zs0fsatx My children's nursery school teacher used that expression (New York State, 1980s). That's also where I learned to say "see you next time" instead of "see you soon," so as not to raise any expectations that might not happen.