Narrated Abu Hurairah:
that the Messenger of Allah (ﷺ) said: "Al-Hamdulillah is Umm Al-Qur'an and Umm Al-Kitab and the seven oft-repeated." (IT)
English reference (IT): Vol. 5, Book 44, Hadith 3124 (IT)
Arabic reference (IT): Book 47, Hadith 3415 (IT)