Sunan An-Nasa'i

It was narrated that Uqbah bin Amr said:The Messenger of Allah (ﷺ) said: 'Some verses were revealed to me tonight, the likes of which have never been seen: ""Say: I seek refuge with (Allah), the Lord of the daybreak."" [Surat al-Falaq:1] and ""Say: I seek refuge with (Allah) the Lord of mankind."" [Surat an-Naas:]