﴿ يَٰدَاوُۥدُ إِنَّا جَعَلْنَٰكَ خَلِيفَةًۭ فِى ٱلْأَرْضِ فَٱحْكُم بَيْنَ ٱلنَّاسِ بِٱلْحَقِّ وَلَا تَتَّبِعِ ٱلْهَوَىٰ فَيُضِلَّكَ عَن سَبِيلِ ٱللَّهِ ۚ إِنَّ ٱلَّذِينَ يَضِلُّونَ عَن سَبِيلِ ٱللَّهِ لَهُمْ عَذَابٌۭ شَدِيدٌۢ بِمَا نَسُوا۟ يَوْمَ ٱلْحِسَابِ ﴾

“[And We said:] “O David! Behold, We have made thee a [prophet and, thus, Our] vicegerent on earth: judge, then, between men with justice, and do not follow vain desire, lest it lead thee astray from the path of God: verily, for those who go astray from the path of God there is suffering severe in store for having forgotten the Day of Reckoning!””

A ruler always has two options before him—to decide cases according to his own whims or in consonance with principles of justice. The ruler who decides matters according to his own whims and desires, has in fact gone astray, and will ultimately have to suffer the scourge of God. But the ruler who decides cases by abiding by the principles of truth and justice, is the one who is on the right path. God will reward him immensely. The divine injunction which is applicable to a ruler is equally applicable to his subjects and must be followed by the common man in his respective spheres of authority.