13. The mission of the Prophets Moses and Aaron (peace be upon them) was twofold: First, to invite Pharaoh to the worship and obedience of Allah which has been the foremost aim of the mission of every Prophet, and secondly, to liberate the Israelites from the bondage of Pharaoh, which was specifically assigned to them. The Quran has mentioned sometimes only the first part of their mission (as in Surah An-Naziat) and sometimes only the second.