Musannaf Ibn Abi Shayba 9:1321

Ibn ‘Ulayyah narrated to us, from Yunus, from ‘Amr ibn Sa‘id, who said: Sa‘d ibn Abi Waqqas said: "While I was circumambulating the House (the Kaaba), I saw a woman and her demeanor pleased me, so I wanted to ask about her. But I found her occupied, and the beauty of a woman does not harm you as long as you do not know her."