مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 3114
Marriage
Looking at a Woman who is asked in Marriage, and an Explanation of what may not be seen - Section 2
وَعَنْ مُحَمَّدِ بْنِ جَحْشٍ قَالَ: مَرَّ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلَى مَعْمَرٍ وَفَخذه مَكْشُوفَتَانِ قَالَ: «يَا مَعْمَرُ غَطِّ فَخِذَيْكَ فَإِنَّ الفخذين عَورَة» . رَوَاهُ فِي شرح السّنة
Muhammad b. Jahsh told that God’s Messenger came upon Ma'mar when his thighs were uncovered and said, "Cover your thighs, Ma'mar, for the thighs are private parts.” It is transmitted in Sharh as-sunna.
Mishkat al-Masabih, 3114ضَعِيف (الألباني)