Qatadah on Istighfar: Quran shows us spiritual diseases, their cures

Salam ibn Miskin reported: Qatadah, may Allah have mercy on him, said, “Verily, this Quran tells you about your diseases and your cures. As for your diseases, they are your sins. As for your cures, it is seeking the forgiveness of Allah.”

Source: Shu’ab al-Imān 6643

عن سَلام بْن مِسْكِينٍ قال قَتَادَة رحمه الله إِنَّ الْقُرْآنَ يَدُلُّكُمْ عَلَى دَائِكُمْ وَدَوَائِكُمْ أَمَّا دَاؤُكُمْ فَذُنُوبُكُمْ وَأَمَّا دَوَاؤُكُمْ فَالاسْتِغْفَارُ

6643 شعب الإيمان للبيهقي