The Prophet ﷺ saw Jurhada in the mosque wearing a cloak that had slipped to expose his thigh, so he said, "The thigh is part of the private area."
حدثنا سفيان عن أبي النضر
أن النبي ﷺ رأى جرهدا في المسجد وعليه بردة قد انكشف فخذه فقال الفخذ عورة
Its isnad is hasan, and he only cited it to clarify the disagreement about the name of Abdul-Rahman bin Jurhad.