It's possible you're thinking of a combination of words:
* "Khub" (خوب) means "good" in Farsi.
* "Khabidi" (خوابیدی) means "you slept" in Farsi.
Therefore, a phrase with a similar meaning could be:
* "Khub khabidi?" (خوب خوابیدی?) which means "Did you sleep well?"
Let me know if you have any other phrases you'd like me to translate!