324.I [Al-Mughira ibn Shu'bah] asked for a woman in marriage and Allah's Messenger (peace be upon him) asked me whether I had looked at her. When I replied that I had not, he said, "Then look at her, for it may produce love between you." I went to her parents and informed them of the Prophet's advice. They seemed to disapprove of the idea. Their daughter heard the conversation from her room and said, "If the Prophet has told you to look at me, then look." I looked at her, and subsequently married her.
(Ahmad, Tirmidhi, Ibn Majah Ibn Hibban, Darimi).
(The Lawful and Prohibited in Islam (arb: Al Halal Wal Haram Fil Islam) by. Yusuf Qaradawi).