The Peak of Eloquence · Hadith 1623 (#Passage #432)
Chapter 73 | To Muawiya
وَأُقْسِمُ بِاللَّهِ إِنَّهُ لَوْ لَا بَعْضُ الِاسْتِبْقَاءِ لَوَصَلَتْ إِلَيْكَ مِنِّي قَوَارِعُ، تَقْرَعُ الْعَظْم، وَتَهْلِسُ اللَّحْمَ!
I swear by Allāh that, had it not been for (my) giving you time, you would have faced from me catastrophe that would have crushed the bones and removed the flesh.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).