مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 2340
Supplications
Prayer for Pardon, and Repentance - Section 2
وَعَنْ أَبِي بَكْرٍ الصِّدِّيقِ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَا أَصَرَّ مَنِ اسْتَغْفَرَ وَإِنْ عَادَ فِي الْيَوْمِ سَبْعِينَ مَرَّةً» . رَوَاهُ التِّرْمِذِيُّ وَأَبُو دَاوُدَ
Abu Bakr as-Siddiq reported God's messenger as saying, “He who asks pardon is not a confirmed sinner, even if he returns to his sin seventy times a day.” Tirmidhi and Abu Dawud transmitted it.
Mishkat al-Masabih, 2340ضَعِيف (الألباني)