[Machine] While we were with the Messenger of Allah ﷺ on a certain day, a man with extremely white clothes and intense black hair appeared. There were no signs of travel on him and we did not know him until he sat down next to the Messenger of Allah ﷺ . He leaned his knees against the Prophet's knees and placed his hands on his thighs. Then he said, "O Muhammad, tell me about Islam. What is Islam?" The Messenger of Allah ﷺ replied, "Islam is to testify that there is no god but Allah and that Muhammad is His servant and Messenger, to establish prayer, to give Zakat, to fast in Ramadan, and to perform Hajj if you are able to do so." The man said, "You have spoken the truth." Then he listed the rest of the Hadith. Then the Messenger of Allah ﷺ said to me, "O Umar, do you know who the questioner was?" I replied, "Allah and His Messenger know best." He said, "That was Gabriel. He came to teach you your religion."
بَيْنَمَا نَحْنُ عِنْدَ رَسُولِ اللهِ ﷺ ذَاتَ يَوْمٍ إِذْ طَلَعَ رَجُلٌ شَدِيدُ بَيَاضِ الثِّيَابِ شَدِيدُ سَوَادِ الشَّعْرِ لَا يُرَى عَلَيْهِ أَثَرُ السَّفَرِ وَلَا نَعْرِفُهُ حَتَّى جَلَسَ إِلَى رَسُولِ اللهِ ﷺ فَأَسْنَدَ رُكْبَتَهُ إِلَى رُكْبَتِهِ وَوَضَعَ كَفَّيْهِ عَلَى فَخِذَيْهِ ثُمَّ قَالَ يَا مُحَمَّدُ أَخْبِرْنِي عَنِ الْإِسْلَامِ مَا الْإِسْلَامُ؟ قَالَ رَسُولُ اللهِ ﷺ الْإِسْلَامُ أَنْ تَشْهَدَ أَنْ لَا إِلَهَ إِلَّا اللهُ وَأَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ وَتُقِيمَ الصَّلَاةَ وَتُؤْتِيَ الزَّكَاةَ وَتَصُومَ رَمَضَانَ وَتَحُجَّ الْبَيْتَ إِنِ اسْتَطَعْتَ السَّبِيلَ فَقَالَ الرَّجُلُ صَدَقْتَ فَذَكَرَ الْحَدِيثَ بِطُولِهِ قَالَ ثُمَّ قَالَ لِي رَسُولُ اللهِ ﷺ يَا عُمَرُ أَتَدْرِي مَنِ السَّائِلُ؟ قُلْتُ اللهُ وَرَسُولُهُ أَعْلَمُ قَالَ ذَاكَ جَبْرَائِيلُ أَتَاكُمْ يعَلِّمُكُمْ دِينَكُمْ