Allah Subhanahu Wa Ta'ala Says, Give Your Brother a Date, Give Him a Red Hot Cold.

Allah Subhanahu wa ta'ala instructed Musa'ala in salaam to fast for 30 days. He later added another 10 days, but it is not mentioned in the Quran. Allah then appointed his brother Harun to take care of the masses whilst he was away. The people became unruly and they started doing as they pleased. They got a little date or something good because they didn't want it. It was taken away and they got a jambra in return.