'When it is Ramadan, the gates of Paradise are opened, the gates of Hell are closed, and the devils are chained up."' It was narrated by Ibn Ishaq from Az-Zuhri. (Using translation from Nasāʾī 2101)
قَالَ رَسُولُ اللهِ ﷺ «إِذَا كَانَ رَمَضَانُ فُتِّحَتْ أَبْوَابُ الْجَنَّةِ وَغُلِّقَتْ أَبْوَابُ جَهَنَّمَ وَسُلْسِلَتِ الشَّيَاطِينُ» قَالَ أَبُو عَبْدِ الرَّحْمَنِ رَوَاهُ ابْنُ إِسْحَاقَ عَنِ الزُّهْرِيِّ