Some of the main conditions are: being a Muslim, being an adult, not interested in taking the lead, being a man, being independent, being just, having a conscientious knowledge (Ilm) Regarding the caliphate of Prophet David, the Qur'an says , " O David , surely I have made you caliph in the land , so do justice to the people and do not follow inclinations , for it will lead you astray from the path of Allah. Surely for those who deviate from the path of Allah." There is severe punishment because they forgot the Day of Reckoning. " Quran 36:28