مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 3113
Marriage
Looking at a Woman who is asked in Marriage, and an Explanation of what may not be seen - Section 2
وَعَنْ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ لَهُ: «يَا عَلِيُّ لَا تُبْرِزْ فَخِذَكَ وَلَا تَنْظُرْ إِلَى فَخِذِ حَيٍّ وَلَا مَيِّتٍ» . رَوَاهُ أَبُو دَاوُد وَابْن مَاجَه
‘Ali told that God’s Messenger said to him, "Do not uncover your thigh, ‘Ali, and do not look at the thigh of anyone alive or dead.” Abu Dawud and Ibn Majah transmitted it.
Mishkat al-Masabih, 3113ضَعِيف (الألباني)