I was leading the Messenger of Allah's ﷺ mount during a journey when he said, "Uqba, shall I not teach you the two best surahs ever recited?"He then taught me "Say, I seek refuge in the Lord of daybreak" [Falaq 113:1] and "Say, I seek refuge in the Lord of mankind" [Nas 114:1]. He noticed that I was not greatly delighted by them.When he dismounted for the dawn prayer, he led the people in the dawn prayer reciting these two surahs. After the Messenger of Allah ﷺ finished the prayer, he turned to me and said, "Uqba, how did you find that?"
أخبرنا أحمد بن عمرو قال أنبأنا ابن وهب قال أخبرني معاوية بن صالح عن ابن الحارث وهو العلاء عن القاسم مولى معاوية
كنت أقود برسول الله ﷺ في السفر فقال رسول الله ﷺ يا عقبة ألا أعلمك خير سورتين قرئتا فعلمني قل أعوذ برب الفلق و قل أعوذ برب الناس فلم يرني سررت بهما جدا فلما نزل لصلاة الصبح صلى بهما صلاة الصبح للناس فلما فرغ رسول الله ﷺ من الصلاة التفت إلي فقال يا عقبة كيف رأيت
[Its isnad is hasan] Abu Dawud narrated it in Salah, chapter on Muawwidhatayn, no. 1462, from Ahmad bin Amr bin Sarh with this chain, and it is also in Kubra, no. 7848, and Ibn Khuzayma graded it sahih, no. 535.Qasim explicitly stated hearing it from Uqbah, in Amal al-Yawm wal-Layla of Nasai, no. 889, and it has a corroborating witness mentioned earlier, no. 953.