وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم: «إِذا دخل شهر رَمَضَانُ فُتِحَتْ أَبْوَابُ السَّمَاءِ» . وَفِي رِوَايَةٍ: «فُتِّحَتْ أَبْوَابُ الْجَنَّةِ وَغُلِّقَتْ أَبْوَابُ جَهَنَّمَ وَسُلْسِلَتِ الشَّيَاطِينُ» . وَفِي رِوَايَةٍ: «فُتِحَتْ أَبْوَابُ الرَّحْمَةِ»

Abu Huraira reported God's messenger as saying, "He who fasts during Ramadan with faith and seeking his reward from God will have his past sins forgiven; he who prays during the night in Ramadan with faith and seeking his reward from God will have his past sins forgiven; and he who passes Lailat al-qadr [Night of Decree] in prayer with faith and seeking his reward from God will have his past sins forgiven."(Bukhari and Muslim.)