Abdullah bin Abbas reported,

While Jibreel was sitting with the Prophet ﷺ, he heard a creaking sound from above him. He raised his head and said, "This is a gate of heaven that has been opened today, never having been opened before this day."An angel descended through it, and Jibreel said, "This is an angel who has come down to the earth, never having descended before this day."The angel greeted him with peace and said, "Rejoice in two lights given to you that were never given to any prophet before you, the Opening of the Book and the closing verses of Surah al-Baqarah. You will never recite a single letter from them without being granted what it contains."

Muslim 1877

Sahih

حدثنا حسن بن الربيع وأحمد بن جواس الحنفي قالا حدثنا أبو الأحوص عن عمار بن رزيق عن عبد الله بن عيسى عن سعيد بن جبير

عن ابن عباس قال

بينما جبريل قاعد عند النبي ﷺ سمع نقيضا من فوقه فرفع رأسه فقال هذا باب من السماء فتح اليوم لم يفتح قط إلا اليوم فنزل منه ملك فقال هذا ملك نزل إلى الأرض لم ينزل قط إلا اليوم فسلم وقال أبشر بنورين أوتيتهما لم يؤتهما نبي قبلك فاتحة الكتاب وخواتيم سورة البقرة لن تقرأ بحرف منهما إلا أعطيته

مسلم 1877صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Virtues of the Quran and what relates to it
Chapter
Virtue of Fatihah and the concluding verses of Surah Baqarah, and encouragement to recite the last two verses of Baqarah
Numbering
Darussalam 1877
Muslim 1877