It was narrated from Abu Sa'eed bin Al-Mu'alla that: The Prophet (ﷺ) passed by him when he was praying, and called him. He said: I finished praying, then I came to him, and he said: 'What kept you from answering me?' He said: 'I was praying.' He said: 'Does not Allah say: O you who believe! Answer Allah (by obeying Him) and (His) Messenger when he calls you to that which will give you life? Shall I not teach you the greatest surah before I leave the masjid?' Then he went to leave, and I said: 'O Messenger of Allah, what about what you said?' He said: All praise and thanks be to Allah, Lord of all that exists. These are the seven oft-recited that I have been given, and the Grand Quran.'
It was narrated that Ubayy bin Ka'b said: The Messenger of Allah (ﷺ) said: 'Allah, the Mighty and Sublime, did not reveal in the Tawrah or the Injil anything like Umm Al-Quran (Al-Fatihah), which is the seven oft-recited, and (Allah said) it is divided between Myself and My slave will have what he asked for.'
It was narrated that Ibn Abbas said: The Prophet (ﷺ) was given seven oft-recited; the seven long ones.
It was narrated that Ibn Abbas said: Concerning the words of Allah, the Mighty and Sublime: Seven of Al-Mathani (seven repeatedly-recited): The seven long ones.