أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " مَنْ قَامَ رَمَضَانَ إِيمَانًا وَاحْتِسَابًا غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ ".
Abu Hurairah reported: The Messenger of Allah ﷺ said, “Whoever stands (in prayer at night) during Ramadan out of faith (iman) and seeking reward, his past sins will be forgiven.”