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)].

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]‏ .‏