(15) باب فَاتِحَةِ الْكِتَابِ
Abu Sa'id b. al-Mu'alla said that when he was praying the Prophet (ﷺ) passed by him and he called him. He said:
I prayed ant then I came to him. He asked: What prevented you from answering me ? He replied: I was praying. He said: Has not Allah said: "O you who believe, respond to Allah and the Apostle when he calls you to that which gives you life ? (8:24) Let me teach you the greatest surah from the Qur'an or in the Qur'an (the narrator Khalid doubted) before I leave the mosque. I said: (I shall memorize) your saying. He said: It is: "Praise be to Allah, the Lord of the Universe" which is the seven oft-repeated verses, and the mighty Qur'an. (ES)
Reference (ES): Sunan Abi Dawud 1458 (ES)
In-book reference (ES): Book 8, Hadith 43 (ES)
English translation (ES): Book 8, Hadith 1453 (ES)