A grey mule was presented as a gift to the Messenger of Allah ﷺ, so he mounted it, and Uqba took hold of it to lead it.The Messenger of Allah ﷺ said to Uqba, "Recite."Uqba replied, "What shall I recite, Messenger of Allah?"The Prophet ﷺ said, "Recite 'Say, I seek refuge in the Lord of the daybreak'."He repeated it for him until he had learned it. He noticed that I was not greatly pleased with it, so he said, "Perhaps you think little of it. You will never stand to pray with anything like it."
حدثنا حيوة بن شريح قال حدثنا بقية حدثنا بحير بن سعد عن خالد بن معدان عن جبير بن نفير
إن رسول الله ﷺ أهديت له بغلة شهباء فركبها فأخذ عقبة يقودها فقال رسول الله ﷺ لعقبة اقرأ فقال وما أقرأ يا رسول الله قال النبي ﷺ اقرأ قل أعوذ برب الفلق فأعادها عليه حتى قرأها فعرف أني لم أفرح بها جدا فقال لعلك تهاونت بها فما قمت تصلي بشيء مثلها
Its isnad is sahih. It was previously mentioned at , and it is found in Nasai 8/252, in the book of seeking refuge.