4455 - وَ رَوَى اَلْحَسَنُ بْنُ مَحْبُوبٍ عَنْ عَبْدِ اَللَّهِ بْنِ سِنَانٍ قَالَ: قُلْتُ لِأَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ اَلرَّجُلُ يُصِيبُ مِنْ أُخْتِ اِمْرَأَتِهِ حَرَاماً أَ يُحَرِّمُ ذَلِكَ عَلَيْهِ اِمْرَأَتَهُ فَقَالَ "إِنَّ اَلْحَرَامَ لاَ يُفْسِدُ اَلْحَلاَلَ وَ اَلْحَلاَلُ يَصْلُحُ بِهِ اَلْحَرَامُ".
Hadith.4455 - Al-Hasan ibn Mahbub narrated from Abdullah ibn Sinan, who said:
I asked Abu Abdullah 
about a man who commits a forbidden act with his wife's sister. Does this make his wife forbidden to him?
Imam said: "Indeed, the forbidden does not invalidate the lawful, and the lawful rectifies the forbidden."
