The Peak of Eloquence · Hadith 2162 (#Passage #521)

ثَكِلَتْكَ أُمُّكَ، أَتَدْرِي مَا الِاسْتِغْفَارُ؟ (إنَّ) الِاسْتِغْفَارُ دَرَجَةُ الْعِلِّيِّينَ، وَهُوَ اسْمٌ وَاقِعٌ عَلَى سِتَّةِ مَعَانٍ:

Your mother may lose you! Do you know what “istighfār” (asking Allāh’s forgiveness) is? “istighfār” is meant for people of a high position. It is a word that stands on six supports.

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).