4435 - وَ رَوَى اَلْحَسَنُ بْنُ مَحْبُوبٍ عَنْ عَبْدِ اَللَّهِ بْنِ سِنَانٍ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ : فِي اَلرَّجُلِ تَكُونُ عِنْدَهُ اَلْجَارِيَةُ يُجَرِّدُهَا وَ يَنْظُرُ إِلَى جِسْمِهَا نَظَرَ شَهْوَةٍ هَلْ تَحِلُّ لِأَبِيهِ وَ إِنْ فَعَلَ أَبُوهُ هَلْ تَحِلُّ لاِبْنِهِ قَالَ "إِذَا نَظَرَ إِلَيْهَا نَظَرَ شَهْوَةٍ وَ نَظَرَ مِنْهَا إِلَى مَا يَحْرُمُ عَلَى غَيْرِهِ لَمْ تَحِلَّ لاِبْنِهِ وَ إِنْ فَعَلَ ذَلِكَ اَلاِبْنُ لَمْ تَحِلَّ لِلْأَبِ".
Hadith.4435 - And it is narrated from Al-Hasan ibn Mahbub, from Abdullah ibn Sinan, from Abu Abdullah 
regarding a man who has a female slave, strips her, and looks at her body with lustful intent, whether she becomes unlawful for his father, and if the father does the same, whether she becomes unlawful for his son.
Imam said: "If he looks at her with lustful intent and sees from her what is unlawful for others to see, she becomes unlawful for his son. And if the son does the same, she becomes unlawful for the father."
