"Whatever a Verse (revelation) do We abrogate or cause to be forgotten, We bring a better one or similar to it." and He said: "And when We change a Verse in place of another --and Allah knows best what He sends down." and He said: "Allah blots out what He wills and confirms (what He wills). And with Him is the Mother of the Book." "The first thing that was abrogated in the Qur'an was the Qiblah." And He said: "And divorced women shall wait (as regards their marriage) for three menstrual periods." and He said: "And those of your women as have passed the age of monthly courses, for them the 'Iddah, if you have doubt (about their periods), is three months." So (some) of that was abrogated, (according to) His, Most High, saying: "And then divorce them before you have sexual intercourse with them, no 'Iddah have you to count in respect of them."  

فِي قَوْلِهِ { مَا نَنْسَخْ مِنْ آيَةٍ أَوْ نُنْسِهَا نَأْتِ بِخَيْرٍ مِنْهَا أَوْ مِثْلِهَا } وَقَالَ { وَإِذَا بَدَّلْنَا آيَةً مَكَانَ آيَةٍ وَاللَّهُ أَعْلَمُ بِمَا يُنَزِّلُ } الآيَةَ وَقَالَ { يَمْحُو اللَّهُ مَا يَشَاءُ وَيُثْبِتُ وَعِنْدَهُ أُمُّ الْكِتَابِ } فَأَوَّلُ مَا نُسِخَ مِنَ الْقُرْآنِ الْقِبْلَةُ وَقَالَ { وَالْمُطَلَّقَاتُ يَتَرَبَّصْنَ بِأَنْفُسِهِنَّ ثَلاَثَةَ قُرُوءٍ } وَقَالَ { وَاللاَّئِي يَئِسْنَ مِنَ الْمَحِيضِ مِنْ نِسَائِكُمْ إِنِ ارْتَبْتُمْ فَعِدَّتُهُنَّ ثَلاَثَةُ أَشْهُرٍ } فَنُسِخَ مِنْ ذَلِكَ قَالَ تَعَالَى { وَإِنْ طَلَّقْتُمُوهُنَّ مِنْ قَبْلِ أَنْ تَمَسُّوهُنَّ } { فَمَا لَكُمْ عَلَيْهِنَّ مِنْ عِدَّةٍ تَعْتَدُّونَهَا }  

Divorced women shall wait concerning themselves for three monthly periods. Nor is it lawful for them to hide what Allah hath created in their wombs. This means that if a man divorced his wife he had the right to take her back in marriage though he had divorced her by three pronouncements. This was then repealed (by a Qur'anic verse). Divorce is only permissible twice.  

{ وَالْمُطَلَّقَاتُ يَتَرَبَّصْنَ بِأَنْفُسِهِنَّ ثَلاَثَةَ قُرُوءٍ وَلاَ يَحِلُّ لَهُنَّ أَنْ يَكْتُمْنَ مَا خَلَقَ اللَّهُ فِي أَرْحَامِهِنَّ } الآيَةَ وَذَلِكَ أَنَّ الرَّجُلَ كَانَ إِذَا طَلَّقَ امْرَأَتَهُ فَهُوَ أَحَقُّ بِرَجْعَتِهَا وَإِنْ طَلَّقَهَا ثَلاَثًا فَنُسِخَ ذَلِكَ وَقَالَ { الطَّلاَقُ مَرَّتَانِ }  

"Whatever a Verse do We abrogate or cause to be forgotten, We bring a better one or similar to it." and "And when We change a Verse in place of another -and Allah knows best what He sends down" (Al-Nahl 16:101) and "Allah blots out what He wills and confirms (what He wills). And with Him is the Mother of the Book." The first thing that was abrogated in the Qur'an was the Qiblah. And He said: "And divorced women shall wait (as regards their marriage) for three menstrual periods, and it is not lawful for them to conceal what Allah has created in their wombs, if they believe in Allah and the Last Day." "And their husbands have better right to take them back in that period, if they wish for reconciliation." -that is because when a man divorced his wife, he had more right to take her back, even if he had divorced her three times. Then (Allah) abrogated that and said: "The divorce is twice, after that, either you retain her on reasonable terms or release her with kindness." (Using translation from Nasāʾī 3554)  

فِي قَوْلِهِ تَعَالَى {§مَا نَنْسَخْ مِنْ آيَةٍ أَوْ نُنْسِهَا نَأْتِ بِخَيْرٍ مِنْهَا أَوْ مِثْلِهَا} [البقرة 106] وَقَالَ {وَإِذَا بَدَّلْنَا آيَةً مَكَانَ آيَةٍ وَاللهُ أَعْلَمُ بِمَا يُنَزِّلُ} [النحل 101] الْآيَةَ وَقَالَ تَعَالَى {يَمْحُو اللهُ مَا يَشَاءُ وَيُثْبِتُ وَعِنْدَهُ أُمُّ الْكِتَابِ} [الرعد 39] فَأَوَّلُ مَا نُسِخَ مِنَ الْقُرْآنِ الْقِبْلَةُ وَقَالَ تَعَالَى {وَالْمُطَلَّقَاتُ يَتَرَبَّصْنَ بِأَنْفُسِهِنَّ ثَلَاثَةَ قُرُوءٍ وَلَا يَحِلُّ لَهُنَّ أَنْ يَكْتُمْنَ مَا خَلَقَ اللهُ فِي أَرْحَامِهِنَّ} [البقرة 228] إِلَى قَوْلِهِ {إِنْ أَرَادُوا إِصْلَاحًا} [البقرة 228] وَذَلِكَ بِأَنَّ الرَّجُلَ كَانَ إِذَا طَلَّقَ امْرَأَتَهُ فَهُوَ أَحَقُّ بِرَجْعَتِهَا وَإِنْ طَلَّقَهَا ثَلَاثًا فَنَسَخَ ذَلِكَ فَقَالَ {الطَّلَاقُ مَرَّتَانِ فَإِمْسَاكٌ بِمَعْرُوفٍ أَوْ تَسْرِيحٌ بِإِحْسَانٍ} [البقرة 229]