It is narrated from Abu Hurayrah [Radi Allahu anhu] that the Messenger of Allah صلى الله عليه وسلم said,

“When it is the first night of Ramadan the evil devils are chained. The gates of Fire are locked- not a single gate is opened, and the gates of Paradise are opened- not a single gate is locked, and a caller calls out : ’O seeker of good come forth! and O seeker of evil withhold! and there are many whom Allah frees from the Fire – and that is every night.”

[Reported by ibn Majah]