Mishkat al-Masabih 2162
‘Uqba b. ‘Āmir said :
While I was travelling with God's messenger between *al-Juhfa and al-Abwa’ a wind and intense darkness enveloped us, whereupon God’s messenger began to seek refuge in God, reciting “I seek refuge in the Lord of the dawn” and “I seek refuge in the Lord of men.”(Qur’ān, 113 &114) He then said, “Use them, ‘Uqba, when seeking refuge in God, for no one can use anything to compare with them for the purpose.” 
*Al Juhfa- a village about 82 miles from Mecca. Al Abwa’- a village between twenty and thirty miles nearer Medina than al-Juhfa.

Abū Dāwūd transmitted it.
وَعَنْ عُقْبَةَ بْنِ عَامِرٍ قَالَ: بَيْنَا أَنَا سير مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بَيْنَ الْجُحْفَةِ وَالْأَبْوَاءِ إِذْ غَشِيَتْنَا رِيحٌ وَظُلْمَةٌ شَدِيدَةٌ فَجَعَلَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُعَوِّذُ ب (أعوذ بِرَبّ الفلق)
و (أعوذ بِرَبِّ النَّاسِ)
وَيَقُولُ: «يَا عُقْبَةُ تَعَوَّذْ بِهِمَا فَمَا تَعَوَّذَ مُتَعَوِّذٌ بِمِثْلِهِمَا» . رَوَاهُ أَبُو دَاوُدَ