It is also established in Sahīh Muslim that Ibn ʿAbbās said:

“While Gabriel was sitting with the Prophet, may Allah bless him and grant him peace, he heard a creaking sound above him. He raised his head and said, ‘This is a gate in heaven that has been opened today; it has never been opened before today.’ An angel descended through it, and Gabriel said, ‘This is an angel who has come down to earth; he has never descended before today.’ The angel greeted him and said, ‘Rejoice in two lights you have been given, which no prophet before you was given: the Opening of the Book and the concluding verses of Sūrat al-Baqarah. You will not recite a single phrase from them without being granted it.’”

Some hadiths state:

“He was given the Opening of the Book from a treasure beneath the Throne.”

Section

Allah Most High says in the Mother of the Quran, the Seven Oft-Repeated Verses, and the Magnificent Quran:

“You alone we worship, and You alone we ask for help.”

This surah is the Mother of the Quran, the Opening of the Book, the Seven Oft-Repeated Verses, and the Magnificent Quran. It is the Healing Surah, and its recitation is obligatory in the prayers: no prayer is valid without it. It is also the Sufficient Surah: it suffices in place of other passages, but no other passage suffices in its place.

Prayer is the best of deeds. It consists of good words and righteous action. The best and most obligatory of its good words is the Quran, and the best and most obligatory of its righteous actions is prostration. Allah brought these two together in the first surah He revealed to His Messenger, which He began