Riyad as-Salihin, Book 9, Hadith 1220 (In-Book) ⓘ
Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah said, "When Ramadan begins, the gates of Jannah are opened, the gates of Hell are closed, and the devils are chained."[Al-Bukhari and Muslim].
وعنه رضي الله عنه أن رسول الله صلى الله عليه وسلم قال: "إذا جاء رمضان فتحت أبواب الجنة، وغلقت أبواب النار، وصفدت الشياطين" ((متفق عليه))