"I was with the Messenger of Allah [SAW] on the road to Makkah when I found myself alone with the Messenger of Allah [SAW]. I drew close to him and he said: 'Say.' I said: 'What should I say?' He said: 'Say.' I said: 'What should I say?' He said: 'Say: I seek refuge with (Allah) the Lord of the daybreak...' until he finished (the Surah), then he said: 'Say: I seek refuge with (Allah) the Lord of mankind...' until he finished it. Then he said: 'The people cannot seek refuge with Allah by means of anything better than these two.'" (Using translation from Nasāʾī 5429)  

كُنْتُ مَعَ رَسُولِ اللهِ ﷺ فِي طَرِيقِ مَكَّةَ فَأَصَبْتُ خُلْوَةً مِنْ رَسُولِ اللهِ ﷺ فَدَنَوْتُ مِنْهُ فَقَالَ لِي «قُلْ» فَقُلْتُ مَا أَقُولُ؟ قَالَ «قُلْ» قُلْتُ مَا أَقُولُ؟ قَالَ قُلْ أَعُوذُ بِرَبِّ الْفَلَقِ حَتَّى خَتَمَهَا ثُمَّ قَالَ قُلْ أَعُوذُ بِرَبِّ النَّاسِ حَتَّى خَتَمَهَا ثُمَّ قَالَ لِي «مَا تَعَوَّذَ النَّاسُ بِأَفْضَلَ مِنْهُمَا»