The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fada'il Al-Sahabah)
Muslim :: Book 31 : Hadith 5876
'Amr b. al-'As reported that Allah's Messenger (may peace be upon him) sent him in command of the army despatched to Dhat-as-Salasil. When 'Amr b. al-'As came back to the Holy Prophet (may peace be upon him) he said: Who amongst people are dearest to you? He said: A'isha. He then said: Who amongst men? He said: Her father, and I said: And who next? He said: Umar. He then enumerated some other men.