This is because they rebelled and went on transgressing.
وَإِذَا لَقُوا الَّذِينَ آمَنُوا قَالُوا آمَنَّا وَإِذَا خَلَا بَعْضُهُمْ إِلَىٰ بَعْضٍ قَالُوا أَتُحَدِّثُونَهُمْ بِمَا فَتَحَ اللَّهُ عَلَيْكُمْ لِيُحَاجُّوكُمْ بِهِ عِنْدَ رَبِّكُمْ ۚ أَفَلَا تَعْقِلُونَ 77.
Narrated by women and horses in the true small mosque.
Empat surah lainnya yang diawali dengan lafaz Hamdulillah yaitu surah 175 M.
And their husbands have the better right to take them back in that period if they wish for reconciliation.
Sungguh, Engkaulah Yang Maha Mengetahui, Mahabijaksana.