It is narrated from Sayyiduna Jarid that once he was sitting with his thigh uncovered. The Prophet (ﷺ) passed by and the Prophet (ﷺ) said: Cover it, for the thigh is 'awrah (a part that must be covered).
Hadith Referenceمسند احمد / مسند المكيين / 15932
Hadith Gradingحکم دارالسلام:حسن بشواهده ، وهذا إسناد ضعيف لاضطرابه ، وابن أبى الزناد تكلموا فى روايته عن أبيه