True meaning of istighfār in Islam
Nahj al-Balāgha|Volume 1|Book 3|Chapter 417
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.