(1) باب فَضْلِ شَهْرِ رَمَضَانَ
Abu Huraira reported Allah's Messenger (ﷺ) as saying:
When there comes the month of Ramadan, the gates of mercy are opened, and the gates of Hell are locked and the devils are chained,
Reference: Sahih Muslim 1079 a
In-book reference: Book 13, Hadith 1
USC-MSA web (English) reference(deprecated numbering scheme): Book 6, Hadith 2361