2:230
فَ إِن طَلَّقَ هَا فَ لَا تَحِلُّ لَ هُۥ مِنۢ بَعْدُ حَتَّىٰ تَنكِحَ زَوْجًا غَيْرَ هُۥ فَ إِن طَلَّقَ هَا فَ لَا جُنَاحَ عَلَيْ هِمَآ أَن يَتَرَاجَعَ آ إِن ظَنَّ آ أَن يُقِيمَ ا حُدُودَ ٱللَّهِ وَ تِلْكَ حُدُودُ ٱللَّهِ يُبَيِّنُ هَا لِ قَوْمٍ يَعْلَمُ ونَ
And if he has divorced her [for the third time], then she is not lawful to him afterward until [after] she marries a husband other than him. And if the latter husband divorces her [or dies], there is no blame upon the woman and her former husband for returning to each other if they think that they can keep [within] the limits of Allah. These are the limits of Allah, which He makes clear to a people who know.