Hadith 12:29
‘A'isha reported God’s Messenger as saying, “No vow must be taken to do an act of disobedience, and the atonement for it is the same as for an oath.” Abu Dawud, Tirmidhi and Nasa’i transmitted it.
عَنْ عَائِشَةَ قَالَتْ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا نَذْرَ فِي مَعْصِيَةٍ وَكَفَّارَتُهُ كَفَّارَةُ الْيَمِينِ» . رَوَاهُ أَبُو دَاوُدَ وَالتِّرْمِذِيُّ وَالنَّسَائِيّ
Original Reference: Mishkat al-Masabih 3435