Gates of Heaven & Hell
It was narrated that Abu Hurairah said:
“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.
Reference: Sunan an-Nasa’i 2106
In-book reference: Book 22, Hadith 17