230فَإِن طَلَّقَهَا فَلَا تَحِلُّ لَهُۥ مِنۢ بَعْدُ حَتَّىٰ تَنكِحَ زَوْجًا غَيْرَهُۥ ۗ فَإِن طَلَّقَهَا فَلَا جُنَاحَ عَلَيْهِمَآ أَن يَتَرَاجَعَآ إِن ظَنَّآ أَن يُقِيمَا حُدُودَ ٱللَّهِ ۗ وَتِلْكَ حُدُودُ ٱللَّهِ يُبَيِّنُهَا لِقَوْمٍ يَعْلَمُونَ
[230] And if the husband divorces his wife (for the third time), she shall not remain his lawful wife after this (absolute) divorce, unless she marries another husband and the second husband divorces her.253 (In that case) there is no harm if they re-marry, provided that the woman and her first husband are convinced that they will be able to keep within the bounds fixed by Allah. And these are Allah's bounds, which He makes clear for the guidance of those who know (the consequences of transgression).
253Authentic Traditions warn against any pre-arranged scheme that a certain man should marry a certain divorced woman with the understanding that he would divorce her again to enable the former husband to remarry his divorced wife. This shall be an unlawful act and such a marriage shall be no marriage at all but adultery and the woman shall not become the lawful wife of the first husband by such a prearranged scheme. Hadrat `Ali, Ibn Mas'ud Abu Hurairah and `Uqbah bin-'Amir, all relate the Tradition to the effect that the Holy Prophet cursed all the persons who indulge in such devices.