Messenger of Allah ﷺ was traveling on one of his journeys, and ʿUmar bin Al-Khattab was traveling along with him at night. ʿUmar asked him about something, but Messenger of Allah ﷺ did not answer him. He asked again, but he did not answer. He asked for the third time, but he did not answer. On that, ʿUmar said to himself, "May your mother lose you! You have asked Messenger of Allah ﷺ three times, but he did not answer at all!" ʿUmar said, "So I made my camel go fast till I was ahead of the people, and I was afraid that something might be revealed about me. After a little while I heard a call maker calling me, I said, 'I was afraid that some Qur'anic Verse might be revealed about me.' So I went to Allah's Apostle and greeted him. He said, 'Tonight there has been revealed to me a Surah which is dearer to me than that on which the sun shines (i.e. the world).' Then he recited: 'Verily! We have given you (O Muhammad), a manifest victory.' " (Surat al-Fath) No. (48.1).  

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يَسِيرُ فِي بَعْضِ أَسْفَارِهِ وَعُمَرُ بْنُ الْخَطَّابِ يَسِيرُ مَعَهُ لَيْلاً فَسَأَلَهُ عُمَرُ عَنْ شَىْءٍ فَلَمْ يُجِبْهُ رَسُولُ اللَّهِ ﷺ ثُمَّ سَأَلَهُ فَلَمْ يُجِبْهُ ثُمَّ سَأَلَهُ فَلَمْ يُجِبْهُ فَقَالَ عُمَرُ ثَكِلَتْكَ أُمُّكَ نَزَرْتَ رَسُولَ اللَّهِ ﷺ ثَلاَثَ مَرَّاتٍ كُلَّ ذَلِكَ لاَ يُجِيبُكَ قَالَ عُمَرُ فَحَرَّكْتُ بَعِيرِي حَتَّى كُنْتُ أَمَامَ النَّاسِ وَخَشِيتُ أَنْ يَنْزِلَ فِيَّ قُرْآنٌ فَمَا نَشِبْتُ أَنْ سَمِعْتُ صَارِخًا يَصْرُخُ قَالَ فَقُلْتُ لَقَدْ خَشِيتُ أَنْ يَكُونَ نَزَلَ فِيَّ قُرْآنٌ قَالَ فَجِئْتُ رَسُولَ اللَّهِ ﷺ فَسَلَّمْتُ عَلَيْهِ فَقَالَ لَقَدْ أُنْزِلَتْ عَلَىَّ اللَّيْلَةَ سُورَةٌ لَهِيَ أَحَبُّ إِلَىَّ مِمَّا طَلَعَتْ عَلَيْهِ الشَّمْسُ ثُمَّ قَرَأَ {إِنَّا فَتَحْنَا لَكَ فَتْحًا مُبِينًا}