While Messenger of Allah ﷺ was proceeding at night during one of his journeys and ʿUmar bin Al-Khattab was traveling beside him, ʿUmar asked him about something but Messenger of Allah ﷺ did not reply. He asked again, but he did not reply, and then he asked (for the third time) but he did not reply. On that, ʿUmar bin Al-Khattab said to himself, "Thakilat Ummu ʿUmar (May ʿUmar's mother lose her son)! I asked Messenger of Allah ﷺ three times but he did not reply." ʿUmar then said, "I made my camel run faster and went ahead of the people, and I was afraid that some Qur'anic Verses might be revealed about me. But before getting involved in any other matter. I heard somebody calling me. I said to myself, 'I fear that some Qur'anic Verses have been revealed about me,' and so I went to Messenger of Allah ﷺ and greeted him. He (Messenger of Allah ﷺ ) said, 'Tonight a Sura has been revealed to me, and it is dearer to me than that on which the sun rises (i.e. the world)' Then he recited: "Verily, We have given you a manifest victory." (48.1)
أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يَسِيرُ فِي بَعْضِ أَسْفَارِهِ وَعُمَرُ بْنُ الْخَطَّابِ يَسِيرُ مَعَهُ لَيْلاً فَسَأَلَهُ عُمَرُ بْنُ الْخَطَّابِ عَنْ شَىْءٍ فَلَمْ يُجِبْهُ رَسُولُ اللَّهِ ﷺ ثُمَّ سَأَلَهُ فَلَمْ يُجِبْهُ ثُمَّ سَأَلَهُ فُلَمْ يُجِبْهُ فَقَالَ عُمَرُ بْنُ الْخَطَّابِ ثَكِلَتْ أُمُّ عُمَرَ نَزَرْتَ رَسُولَ اللَّهِ ﷺ ثَلاَثَ مَرَّاتٍ كُلَّ ذَلِكَ لاَ يُجِيبُكَ قَالَ عُمَرُ فَحَرَّكْتُ بَعِيرِي ثُمَّ تَقَدَّمْتُ أَمَامَ النَّاسِ وَخَشِيتُ أَنْ يُنْزَلَ فِيَّ الْقُرْآنُ فَمَا نَشِبْتُ أَنْ سَمِعْتُ صَارِخًا يَصْرُخُ بِي فَقُلْتُ لَقَدْ خَشِيتُ أَنْ يَكُونَ نَزَلَ فِيَّ قُرْآنٌ 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}