I was with Ayesha, the Mother of the Believers, when she said, "It was revealed to Muhammad ﷺ in Mecca, while I was just a young girl playing, 'Rather, the Hour is their appointed time, and the Hour is more disastrous and more bitter' [Qamar 54:46]."
إني عند عائشة أم المؤمنين، قالت: لقد أنزل على محمد ﷺ بمكة وإني لجارية ألعب: {بل الساعة موعدهم والساعة أدهى وأمر}
Bukhari narrated it in the Tafsir (4876) from Ibrahim bin Musa, who said, Hisham bin Yusuf told us, that Ibn Jurayj informed them, saying, Yusuf bin Mahak informed me, and he mentioned it accordingly. He also mentioned it with the same chain in detail in the Virtues of the Quran, as will follow.