It was narrated from Az-Zuhri, from Abu Salamah, from Abu Hurairah that: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:

English translation · Sunan an-Nasa'i