A marriage so full of love that it looses its vigour…
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While explaining the purpose of marriage: {وَمِنْ آيَاتِهِ أَنْ خَلَقَ لَكُمْ مِنْ أَنْفُسِكُمْ أَزْوَاجًا لِتَسْكُنُوا إِلَيْهَا وَجَعَلَ بَيْنَكُمْ مَوَدَّةً وَرَحْمَةً إِنَّ فِي ذَلِكَ لَآيَاتٍ لِقَوْمٍ يَتَفَكَّرُونَ} [الروم: 21] …And from his signs is that he created for you from yourselves a pair so that you may find solace with her; and He made between you …