Musnad Abu Ya'la al-Mawsili 117:256

Zuhayr narrated to us, Affan narrated to us, Salam Abu al-Mundhir narrated to us, from Thabit, from Anas ibn Malik, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There have been made beloved to me from your world: women and perfume. And the coolness of my eyes has been placed in the prayer."