وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، أَنَّهُ سَمِعَ رَجُلاً، يَسْأَلُ عُرْوَةَ بْنَ الزُّبَيْرِ عَنْ رَجُلٍ، قَالَ لاِمْرَأَتِهِ كُلُّ امْرَأَةٍ أَنْكِحُهَا عَلَيْكِ مَا عِشْتِ فَهِيَ عَلَىَّ كَظَهْرِ أُمِّي ‏.‏ فَقَالَ عُرْوَةُ بْنُ الزُّبَيْرِ يُجْزِئُهُ عَنْ ذَلِكَ عِتْقُ رَقَبَةٍ ‏.‏

Yahya related to me from Malik from Hisham ibn Urwa that he hearda man ask Urwa ibn az-Zubayr about a man who said to his wife, "Anywoman I marry along with you as long as you live will be like mymother's back to me." Urwa ibn az-Zubayr said, "The freeing of slavesis enough to release him from that." Translation Not Available

Book Ref: Muwatta Imam Malik Book 29 Hadith 1180
Web Ref:  Muwatta Imam Malik Book 29 Hadith 23