Sunan an-Nasa'i 5431
سنن النسائي#5431SahihIt was narrated that 'Uqbah bin 'Amir Al-Juhani said:"The Messenger of Allah [SAW] said to me: 'Say.' I said: 'What should I say?' He said: 'Say: He is Allah (the) One,' 'Say: I seek refuge with (Allah) the Lord of the daybreak,' 'Say: I seek refuge with (Allah) the Lord of mankind.' The Messenger of Allah [SAW] recited them, then he said: 'The people have never recited anything like them, or the people have never sought refuge (with Allah) by means of anything like them
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 ZaiHasan
In-book reference: 50:4