Sunan an-Nasa'i 954
سنن النسائي#954SahihIt 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:]
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 11:79