Umar bin Khattab reported,

I went out to intercept the Messenger of Allah ﷺ before I had embraced Islam, but I found that he had reached the mosque before me. So I stood behind him, and he began reciting Surah al-Haqqah. I started marveling at the composition of the Quran.I said to myself, "By Allah, this man is a poet, just as the Quraysh have said."Then he recited, "Indeed, it is the speech of a noble messenger. It is not the speech of a poet. Little do you believe."I said to myself, "Then he is a soothsayer."He recited, "Nor is it the speech of a soothsayer. Little do you remember. It is a revelation from the Lord of the worlds. And if he had fabricated against Us any sayings, We would have seized him by the right hand, then We would have cut from him the aorta, and there is no one of you who could have prevented it" [Haqqah 69:40–47], to the end of the surah.At that moment, Islam settled deeply into my heart.

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قال عمر بن الخطاب رضي الله عنه

خرجت أتعرض رسول الله ﷺ قبل أن أسلم فوجدته قد سبقني إلى المسجد فقمت خلفه فاستفتح سورة الحاقة فجعلت أعجب من تأليف القرآن قال فقلت هذا والله شاعر كما قالت قريش قال فقرأ {إنه لقول رسول كريم وما هو بقول شاعر قليلا ما تؤمنون} قال قلت كاهن قال {ولا بقول كاهن قليلا ما تذكرون تنزيل من رب العالمين ولو تقول علينا بعض الأقاويل لأخذنا منه باليمين ثم لقطعنا منه الوتين فما منكم من أحد عنه حاجزين} إلى آخر السورة قال فوقع الإسلام في قلبي كل موقع