Bakr bin Abdullah al-Muzani (may Allah have mercy on him) said: Mughirah bin Shu'bah (may Allah be pleased with him) proposed marriage to a woman and put her matter before the Prophet (peace and blessings be upon him). He (peace and blessings be upon him) said: "Have you seen her?" He said: No. He (peace and blessings be upon him) said: "If you are able to look at her before marrying her, then do so, for that is more likely to keep love between the two of you."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 18177