Fortress of the Muslim
Hisn al-Muslim 140
Arabic hadith text
مَا مِنْ عَبْدٍ يُذنِبُ ذَنْباً فَيُحْسِنُ الطُّهُورَ، ثُمَّ يَقُومُ فَيُصَلِّي رَكْعَتَيْنِ، ثُمَّ يَسْتَغْفِرُ اللَّهَ إِلاَّ غَفَرَ اللَّهُ لَهُ
Translation
No servant commits a sin, then performs ablution well and stands to pray two units, then asks Allah to forgive him, without Allah forgiving him.