the Prophet used to encourage praying Qiyam Al-Lail in Ramadan, but not forcibly. And he said: "When Ramadan begins, the gates of Paradise are opened and the gates of Hell are close, and the devils are chained up." Ibn Al-Mubarak narrated it in Mursal from: (Using translation from Nasāʾī 2104)
أَنَّ النَّبِيَّ ﷺ كَانَ يُرَغِّبُ فِي قِيَامِ رَمَضَانَ مِنْ غَيْرِ عَزِيمَةٍ وَقَالَ «إِذَا دَخَلَ رَمَضَانُ فُتِّحَتْ أَبْوَابُ الْجَنَّةِ وَغُلِّقَتْ أَبْوَابُ الْجَحِيمِ وَسُلْسِلَتْ فِيهِ الشَّيَاطِينُ» قَالَ أَبُو عَبْدِ الرَّحْمَنِ أَرْسَلَهُ ابْنُ الْمُبَارَكِ