Quran 4:129 from Surah An-Nisaa on Divine Marvels.
وَلَن تَسۡتَطِيعُوٓاْ أَن تَعۡدِلُواْ بَيۡنَ ٱلنِّسَآءِ وَلَوۡ حَرَصۡتُمۡۖ فَلَا تَمِيلُواْ كُلَّ ٱلۡمَيۡلِ فَتَذَرُوهَا كَٱلۡمُعَلَّقَةِۚ وَإِن تُصۡلِحُواْ وَتَتَّقُواْ فَإِنَّ ٱللَّهَ كَانَ غَفُورٗا رَّحِيمٗا
English translation: And never will you be able to deal justly between [the] women even if you desired but (do) not incline (with) all the inclination and leave her (the other) like the suspended one And if you reconcile and fear (Allah) then indeed Allah is Oft-Forgiving Most Merciful
Transliteration: walan tastati'u an ta'dilu bayna al-nisai walaw harastum fala tamilu kulla al-mayli fatadharuha kal-mu'alaqati wa-in tus'lihu watattaqu fa-inna al-laha kana ghafuran rahiman