Then We ordained the divine assignation for Mussa and arranged the place and the time when We would be exposed to his mental view after he had completed the exclusive religious devotion imposed on him for thirty nights complemented by ten more nights to total forty nights, the requisite for granting him an audience. And when the set time was fulfilled and Mussa was ready to have spiritual audience of Allah, his Creator, he said to his brother Harun: "Take my place and act for me among my people and improve the state of things and put an end to abuse, disorder and malpractice and do not yield to those who are characterized by acts of prepensed malice".