Surah An-Nisaa · 4:129
وَلَنْ تَسْتَطِيعُوا أَنْ تَعْدِلُوا بَيْنَ النِّسَاءِ وَلَوْ حَرَصْتُمْ ۖ فَلَا تَمِيلُوا كُلَّ الْمَيْلِ فَتَذَرُوهَا كَالْمُعَلَّقَةِ ۚ وَإِنْ تُصْلِحُوا وَتَتَّقُوا فَإِنَّ اللَّهَ كَانَ غَفُورًا رَحِيمًا
And it will not be within your power to treat your wives with equal fairness, however much you may desire it; and so, do not allow yourselves to incline towards one to the exclusion of the other, leaving her in a state, as it were, of having and not having a husband. But if you put things to rights and are conscious of Him - behold, God is indeed much-forgiving, a dispenser of grace.
Read Surah An-Nisaa 4:129: "And it will not be within your power to treat your wives with equal fairness, however much you may desire it; and so, do..." Full Arabic text, English translation, and image generator.