'When Ramadan begins, the gates of Paradise are opened, the gates of Hell are closed, and the devils are chained up." (Using translation from Nasāʾī 2099)
قَالَ رَسُولُ اللهِ ﷺ إِذَا دَخَلَ شَهْرُ رَمَضَانَ فُتِّحَتْ أَبْوَابُ الرَّحْمَةِ وَغُلِّقَتْ أَبْوَابُ جَهَنَّمَ وَسُلْسِلَتِ الشَّيَاطِينُ