Sura al-Baqara 2:231

وَإِذَا طَلَّقْتُمُ ٱلنِّسَآءَ فَبَلَغْنَ أَجَلَهُنَّ فَأَمْسِكُوهُنَّ بِمَعْرُوفٍ أَوْ سَرِّحُوهُنَّ بِمَعْرُوفٍ وَلَا تُمْسِكُوهُنَّ ضِرَارًا لِّتَعْتَدُوا۟ وَمَن يَفْعَلْ ذَٰلِكَ فَقَدْ ظَلَمَ نَفْسَهُۥ وَلَا تَتَّخِذُوٓا۟ ءَايَٰتِ ٱللَّـهِ هُزُوًا وَٱذْكُرُوا۟ نِعْمَتَ ٱللَّـهِ عَلَيْكُمْ وَمَآ أَنزَلَ عَلَيْكُم مِّنَ ٱلْكِتَٰبِ وَٱلْحِكْمَةِ يَعِظُكُم بِهِۦ وَٱتَّقُوا۟ ٱللَّـهَ وَٱعْلَمُوٓا۟ أَنَّ ٱللَّـهَ بِكُلِّ شَىْءٍ عَلِيمٌ

wa-idhā ṭallaqtumu l-nisāʾa fa-balaghna ajalahunna fa-amsikūhunna bi-maʿrūfin aw sarriḥūhunna bi-maʿrūfin wa-lā tumsikūhunna ḍirāran la-taʿtadū wa-man yafʿal dhālika fa-qad ẓalama nafsahu wa-lā tattakhidhū āyāti allāhi huzuwan wa-idhkurū niʿmata allāhi ʿalaykum wa-mā anzala ʿalaykum mina l-kitābi wa-l-ḥikmati yaʿiẓukum bihi wa-ittaqū allāha wa-iʿlamū annā allāha bi-kulli shayʾin ʿalīmun

When ye divorce women, and they fulfil the term of their ('Iddat), either take them back on equitable terms or set them free on equitable terms; but do not take them back to injure them, (or) to take undue advantage; if any one does that; He wrongs his own soul. Do not treat Allah's Signs as a jest, but solemnly rehearse Allah's favours on you, and the fact that He sent down to you the Book and Wisdom, for your instruction. And fear Allah, and know that Allah is well acquainted with all things.