أَخْبَرَنَا يُونُسُ بْنُ عَبْدِ الأَعْلَى، قَالَ حَدَّثَنَا ابْنُ وَهْبٍ، قَالَ أَخْبَرَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ، عَنْ أَبِي سَلَمَةَ، عَنْ عَائِشَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ نَذْرَ فِي مَعْصِيَةٍ وَكَفَّارَتُهُ كَفَّارَةُ الْيَمِينِ " .
It was narrated from 'Aishah that the Messenger of Allah said: "There is no vow to commit an act of disobedience and its expiation is the expiation for an oath." Translation Not Available
Book Ref: Sunan An Nisai Book 35 Hadith 3834
Web Ref: Sunan An Nisai Vol 4 Book 35 Hadith 3865