وَلِمُسْلِمٍ: «إِذَا حَرَّمَ اَلرَّجُلُ عَلَيْهِ اِمْرَأَتَهُ، فَهِيَ يَمِينٌ يُكَفِّرُهَا»
“When a man makes his wife unlawful for himself, it is (treated like) an oath for which atonement must be made (if broken).”
Bulugh al-Maram 1258, Book 8, Marriage, Hadith 136. 1 min read