Mishkat al-Masabih
Ibn ‘Umar reported the Prophet (ﷺ) as saying, “The sultan is God’s shade on the earth to which each one of His servants who is wronged repairs. When he is just he will have a reward, and it is the duty of the common people to be grateful; but when he acts tyrannically the burden rests on him, and it is the duty of the common people to show endurance.” Baihaqi transmitted in Shuab al iman.
وَعَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «إِنَّ السُّلْطَانَ ظِلُّ اللَّهِ فِي الْأَرْضِ يَأْوِي إِلَيْهِ كُلُّ مَظْلُومٍ مِنْ عِبَادِهِ فَإِذَا عَدَلَ كَانَ لَهُ الْأَجْرُ وَعَلَى الرَّعِيَّةِ الشُّكْرُ وَإِذَا جَارَ كَانَ عَلَيْهِ الْإِصْرُ وعَلى الرّعية الصَّبْر»
Reference