“There are seven categories of people whom God will shelter under the shade of His throne on the Day when there will be no shade except this. [One is] the just leader.”
Justice is the bedrock of society. Islam enjoins people, rulers in particular, to do justice with everyone irrespective of faith or colour. In this hadith God detests a ruler who has bestowed with supremacy yet is ignorant of justice. God will deprive him of His shade in His territory on the Day of Judgement.
In another hadith the Messenger of God ﷺ stated: “People, beware of injustice, for injustice shall be darkness on the Day of Judgement.”(Musnad Ahmed) The Prophet ﷺ asked people to be just and kind. He always had to deal with people and their affairs as a supreme judge, reformer, apostle, and leader of Muslims. In doing justice the Prophet ﷺ made no distinction between believers and non-believers, friends and foes, high and low.
A woman of the Makhzoom family with high family lineage was found guilty of theft. For the prestige of the Quraish, some prominent people, including Usama Ibn Zaid, interceded to save her from punishment. The Prophet ﷺ refused to forgive the crime and expressed displeasure saying: “Many a community ruined itself in the past as they only punished the poor and ignored the offences of the exalted. By Allah, if Muhammad’s daughter Fatimah would have committed theft, her hand would have been severed.” (Bukhari)
Thus, justice promises success in this world and in the hereafter as well.