Abu Huraira reported: The Messenger of Allah ﷺ, said, “On the first night of the month of Ramadan, the devils are chained, the jinn are restrained, and the gates of Hell-fire are closed and none of its gates are opened. The gates of Paradise are opened and none of its gates are closed. A caller announces: O seeker of good, come near! O seeker of evil, stop short! Allah will save them from the Hell-fire and that is during every night of Ramadan.”
Source: Sunan At-Tirmidhi 682
عَنْ أَبِي هُرَيْرَةَ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا كَانَ أَوَّلُ لَيْلَةٍ مِنْ شَهْرِ رَمَضَانَ صُفِّدَتْ الشَّيَاطِينُ وَمَرَدَةُ الْجِنِّ وَغُلِّقَتْ أَبْوَابُ النَّارِ فَلَمْ يُفْتَحْ مِنْهَا بَابٌ وَفُتِّحَتْ أَبْوَابُ الْجَنَّةِ فَلَمْ يُغْلَقْ مِنْهَا بَابٌ وَيُنَادِي مُنَادٍ يَا بَاغِيَ الْخَيْرِ أَقْبِلْ وَيَا بَاغِيَ الشَّرِّ أَقْصِرْ وَلِلَّهِ عُتَقَاءُ مِنْ النَّارِ وَذَلكَ كُلُّ لَيْلَةٍ
682 سنن الترمذي كتاب الصوم عن رسول الله صلى الله عليه وسلم باب ما جاء في فضل شهر رمضان