Al-Adab Al-Mufrad #349
Visitation
'Abdulkarim Abu Umuyyah came to Abu Al'aliyah and on him were wool clothes. So Abu Al'aliyah said "These are but the clothes of monks, as the Muslims, when visiting each other, would beautify themselves."
About Al-Adab Al-Mufrad
This hadith is #349 from Al-Adab Al-Mufrad, in the Book of Visitation. Al-Adab Al-Mufrad contains 1,326 hadiths across 57 books.