(5) باب هَلْ يُقَالُ رَمَضَانُ أَوْ شَهْرُ رَمَضَانَ وَمَنْ رَأَى كُلَّهُ وَاسِعًا
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "When Ramadan begins, the gates of Paradise are opened."
Reference: Sahih al-Bukhari 1898
In-book reference: Book 30, Hadith 8
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 31, Hadith 122