Surah An-Nisa 4:20

وَإِنْ أَرَدتُّمُ ٱسْتِبْدَالَ زَوْجٍ مَّكَانَ زَوْجٍ وَءَاتَيْتُمْ إِحْدَىٰهُنَّ قِنطَارًا فَلَا تَأْخُذُوا۟ مِنْهُ شَيْـًٔا ۚ أَتَأْخُذُونَهُۥ بُهْتَـٰنًا وَإِثْمًا مُّبِينًا

But if you want to replace one wife with another and you have given one of them a great amount [in gifts], do not take [back] from it anything. Would you take it in injustice and manifest sin?

Translation: Saheeh International

Tafsir

And if you desire to exchange a wife in place of another by divorcing the one and you have given to one of the spouses a hundredweight that is a large sum as dowry take of it nothing. …

Excerpt from Tafsir al-Jalalayn, commentary on 4:20, via Quran.com. The reader has the full commentary and 9 more tafsirs.