The Peak of Eloquence · Hadith 1320 (#Passage #129)
Chapter 28 | In response to Muawiya
وَمَا كُنْتُ لِأَعْتَذِرَ مِنْ أَنِّي كُنْتُ أَنْقِمُ عَلَيْهِ أَحْدَاثاً، فَإِنْ كَانَ الذَّنْبُ إِلَيْهِ إِرْشَادِي وَهِدَايَتِي لَهُ، فَرُبَّ مَلُومٍ لَا ذَنْبَ لَهُ «وَقَدْ يَسْتَفِيدُ الظِّنَّةَ الْمُتَنَصِّحُ»
I am not going to offer my excuse for reproving him for (some of) his innovations, for if my good counsel and guidance to him was a sin then very often a person who is blamed has no sin and “sometimes the only reward a counseller [4] reaps is suspicion (of evil)”.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).