"When Ramadan begins, the gates of mercy are opened and the gates of Hall are closed, and the devils are chained up."
Sunan an-Nasa'i Book 22, Hadith 16
← Previous Hadith 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:

Sunan an-Nasa'i Book 22, Hadith 15 Next Hadith → "The Messenger of Allah said: 'There has come to you Ramadan, a blessed month, which Allah, the Mighty and Sublime, has enjoined you to fast. In it the gates of heavens are opened and the gates of Hell are closed, and every devil is chained up. In it Allah has a night which is better than a thousand months; whoever is deprived of its goodness is indeed deprived."'

Sunan an-Nasa'i Book 22, Hadith 17