The Messenger of Allah ﷺ said, "Whoever has two wives and inclines toward one over the other will come on the Day of Resurrection with one of his sides drooping."
حدثنا أبو بكر بن أبي شيبة حدثنا وكيع عن همام عن قتادة عن النضر بن أنس عن بشير بن نهيك
قال رسول الله ﷺ من كانت له امرأتان يميل مع إحداهما على الأخرى جاء يوم القيامة وأحد شقيه ساقط
Its chain is daif. Abu Dawud narrated it in Nikah, chapter "On Dividing Time Fairly Between Wives," hadith 2133, from the hadith of Hammam, transmitted through him. Ibn Hibban and Hakim graded it sahih, as did Dhahabi and others. Qatada narrated with an ambiguous form indicating he heard it indirectly, as noted earlier at hadith 175, and it has a corroborating narration that is daif.