The virtue of a just ruler and the punishment of a tyrant; Encouragement to treat those under one's authority with kindness and the prohibition against causing them hardship Sahih Muslim 142 h
Arabic hadith text
وَحَدَّثَنَا عُقْبَةُ بْنُ مُكْرَمٍ الْعَمِّيُّ، حَدَّثَنَا يَعْقُوبُ بْنُ إِسْحَاقَ، أَخْبَرَنِي سَوَادَةُ بْنُ أَبِي، الأَسْوَدِ حَدَّثَنِي أَبِي أَنَّ مَعْقِلَ بْنَ يَسَارٍ، مَرِضَ فَأَتَاهُ عُبَيْدُ اللَّهِ بْنُ زِيَادٍ يَعُودُهُ . نَحْوَ حَدِيثِ الْحَسَنِ عَنْ مَعْقِلٍ
Translation
It has been narrated on the authority of Abu al-Aswad who said
My father related to me that Ma'qil b. Yasir fell ill. 'Ubaidullah b. Ziyad called on him to inquire after his health. Here follows the tradition as narrated by Hasan from Ma'qil.