A childhood belief about sleeping

As a child i lived in a very hot country , and so during the summer , my mom would make me and my sister have afternoon naps! i was a very hyper child ...and always put up a fight when sleeping time came...In Tehran ( the city i was living in) trucks go through streets selling salt during the afternoon and screaming namakee namakee ( salt salt) ..and so to scare me ...my mom told me that if i didn't sleep agha namakee ( mr. salt) would come and take me away ...and then would turn me into salt and sell me ! I slept every day from that day on ( or acted as though i did) ... and every time i saw salt ... looked at it closely to see if i could see any children ! i actually came face to face with mr.salt once ... i peed myself!