The Book on Government
33/5. Chapter:
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
وَحَدَّثَنَاهُ يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا يَزِيدُ بْنُ زُرَيْعٍ، عَنْ يُونُسَ، عَنِ الْحَسَنِ، قَالَ دَخَلَ ابْنُ زِيَادٍ عَلَى مَعْقِلِ بْنِ يَسَارٍ وَهُوَ وَجِعٌ . بِمِثْلِ حَدِيثِ أَبِي الأَشْهَبِ وَزَادَ قَالَ أَلاَّ كُنْتَ حَدَّثْتَنِي هَذَا، قَبْلَ الْيَوْمِ قَالَ مَا حَدَّثْتُكَ أَوْ، لَمْ أَكُنْ لأُحَدِّثَكَ .
It has been narrated through a different chain of transmitters on the authority of Hasan who said: Ibn, Ziyad paid a visit to Ma'qil b. Yasir who was seriously ill. Here follows the same tradition as has gone before with the addition that Ibn Ziyad asked: Why didn't you narrate this tradition to me before this day? Ma'qil reprimanded him and said: I did not narrate it to you or I was not going to narrate it to you.
Reference : Sahih Muslim 142fIn-book reference : Book 33, Hadith 29USC-MSA web (English) reference : Book 20, Hadith 4501