بُلُوغُ الْمَرَامِ
Bulugh al-Maram 1056
Marriage
وَعَنْ أَبِي هُرَيْرَةَ - رضى الله عنه - عَنْ اَلنَّبِيِّ - صلى الله عليه وسلم -قَالَ : { مَنْ كَانَتْ لَهُ اِمْرَأَتَانِ , فَمَالَ إِلَى إِحْدَاهُمَا , جَاءَ يَوْمَ اَلْقِيَامَةِ وَشِقُّهُ مَائِلٌ } رَوَاهُ أَحْمَدُ , وَالْأَرْبَعَةُ , وَسَنَدُهُ صَحِيح ٌ [1] .
Narrated Abu Hurairah (RA): The Prophet (ﷺ) said: "Anyone who has two wives and inclines to one of them will come on the Day of Resurrection with a side (of his body) inclining." [Reported by Ahmad and al-Arba'a; its chain of narrators is Sahih (authentic)].
Sunnah.com reference: Book 8, Hadith 105