The Messenger of Allah ﷺ said, "Verses have been revealed to me tonight the like of which has never been seen, 'Say, I seek refuge in the Lord of the daybreak' [Falaq 113:1] and 'Say, I seek refuge in the Lord of mankind' [Nas 114:1]."
أخبرني محمد بن قدامة قال حدثنا جرير عن بيان عن قيس
قال رسول الله ﷺ آيات أنزلت علي الليلة لم ير مثلهن قط قل أعوذ برب الفلق وقل أعوذ برب الناس
Muslim narrated it in the book of the prayer of travelers, chapter on the merit of reciting the two protective surahs, hadith no. 814, from the hadith of Jareer bin Abdul-Hameed, with the same wording. It is also in Sunan al-Kubra, hadith no. 1026.