مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 3435
Oaths and Vows
Vows - Section 2
عَنْ عَائِشَةَ قَالَتْ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا نَذْرَ فِي مَعْصِيَةٍ وَكَفَّارَتُهُ كَفَّارَةُ الْيَمِينِ» . رَوَاهُ أَبُو دَاوُدَ وَالتِّرْمِذِيُّ وَالنَّسَائِيّ
‘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.
Mishkat al-Masabih, 3435صَحِيح (الألباني)