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»
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.”
Mishkat al-Masabih 2989, Book 14, Marriage, Hadith 34. 1 min read