أَخْبَرَنَا إِسْحَاقُ بْنُ مَنْصُورٍ، قَالَ أَنْبَأَنَا عُثْمَانُ بْنُ عُمَرَ، قَالَ حَدَّثَنَا يُونُسُ، عَنِ الزُّهْرِيِّ، عَنْ أَبِي سَلَمَةَ، عَنْ عَائِشَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ نَذْرَ فِي مَعْصِيَةٍ وَكَفَّارَتُهُ كَفَّارَةُ يَمِينٍ " .
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 3836
Web Ref: Sunan An Nisai Vol 4 Book 35 Hadith 3867