Narrated `Abdullah bin AzZubair:

(The Verse) "Hold to forgiveness; command what is right..." was revealed by Allah except in connection with the character of the people.

حَدَّثَنَا يَحْيَى، حَدَّثَنَا وَكِيعٌ، عَنْ هِشَامٍ، عَنْ أَبِيهِ، عَنْ عَبْدِ اللَّهِ بْنِ الزُّبَيْرِ، ‏{‏خُذِ الْعَفْوَ وَأْمُرْ بِالْعُرْفِ‏}‏ قَالَ مَا أَنْزَلَ اللَّهُ إِلاَّ فِي أَخْلاَقِ النَّاسِ‏.‏
USC-MSA web (English) reference : Vol. 6, Book 60, Hadith 167
Arabic reference : Book 65, Hadith 4643