This is a gate opened in heaven today which had never been opened before. Then when an angel descended through it, he said: This is an angel who came down to the earth who had never come down before. He greeted and said: Rejoice in two lights given to you which have not been given to any prophet before you: Fatihat al-Kitab and the concluding verses of Surah al-Baqara. You will never recite a letter from them for which you will not be given (a reward). (Using translation from Muslim 806)
بَيْنَمَا جِبْرِيلُ عَلَيْهِ السَّلَامُ قَاعِدٌ عِنْدَ النَّبِيِّ ﷺ سَمِعَ نَقِيضًا مِنْ فَوْقِهِ فَرَفَعَ رَأْسَهُ فَقَالَ هَذَا بَابٌ مِنَ السَّمَاءِ فُتِحَ الْيَوْمَ لَمْ يُفْتَحْ قَطُّ إِلَّا الْيَوْمَ فَنَزَلَ مِنْهُ مَلَكٌ فَقَالَ هَذَا مَلَكٌ نَزَلَ إِلَى الْأَرْضِ لَمْ يَنْزِلْ إِلَّا الْيَوْمَ فَسَلَّمَ وَقَالَ أَبْشِرْ بِنُورَيْنِ أُوتِيتَهُمَا لَمْ يُؤْتَهُمَا نَبِيٌّ قَبْلَكَ فَاتِحَةِ الْكِتَابِ وَخَوَاتِيمِ سُورَةِ الْبَقَرَةِ لَمْ تَقْرَأْ بِحَرْفٍ مِنْهَا إِلَّا أُعْطِيتَهُ