Narrated Ali ibn AbuTalib:

(The narrator Isma'il said: I think ash-Sha'bi attributed this tradition to the Prophet)

The Prophet ﷺ said: Curse be upon the one who marries a divorced woman with the intention of making her lawful for her former husband and upon the one for whom she is made lawful.

حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا زُهَيْرٌ، حَدَّثَنِي إِسْمَاعِيلُ، عَنْ عَامِرٍ، عَنِ الْحَارِثِ، عَنْ عَلِيٍّ، رضى الله عنه - قَالَ إِسْمَاعِيلُ وَأُرَاهُ قَدْ رَفَعَهُ إِلَى النَّبِيِّ ﷺ - أَنَّ النَّبِيَّ ﷺ قَالَ
" لَعَنَ اللَّهُ الْمُحَلِّلَ وَالْمُحَلَّلَ لَهُ " .