Sahih Muslim
The Book of Prayers (Kitab Al-Salat)
Book Number: 004 / Hadith Number: 1774
'Uqba b. 'Amir reported Allah's Messenger (may peace be upon him) as saying: What wonderful verses have been sent down today. the like of which has never been seen! They are:" Say: I seek refuge with the Lord of the dawn," and" Say: I seek refuge with the Lord of men."