It is narrated from Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) married a woman from the desert people, then saw a white patch (of leprosy) on her body, so he separated from her before consummating the marriage.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5834