مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 2331
Supplications
Prayer for Pardon, and Repentance - Section 1
وَعَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ تَابَ قَبْلَ أَنْ تَطْلُعَ الشَّمْسُ مِنْ مَغْرِبِهَا تَابَ الله عَلَيْهِ» . رَوَاهُ مُسلم
Abu Huraira reported God’s messenger as saying, "If anyone repents before the sun rises in the west, God will forgive him." Muslim transmitted it.
Mishkat al-Masabih, 2331صَحِيحٌ (الألباني)