رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1220
The Book of Virtues
The Excellence of Observing Saum (Fasts) during Ramadan
وَعَنْهُ رَضِيَ اللَّه عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ قَالَ: إِذَا جَاءَ رَمَضَانُ فُتِّحَتْ أَبْوَابُ الْجَنَّةِ، وَغُلِّقَتْ أَبْوَابُ النَّارِ، وَصُفِّدَتِ الشَّيَاطِينُ ((مُتَّفَقٌ عَلَيْهِ))
Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah (ﷺ) said, "When Ramadan begins, the gates of Jannah are opened, the gates of Hell are closed, and the devils are chained." [Al-Bukhari and Muslim].
Riyad as-Salihin, 1220