بُلُوغُ الْمَرَامِ
Bulugh al-Maram 998
Marriage
وَعَنِ ابْنِ مَسْعُودٍ - رضى الله عنه - قَالَ : { لَعَنَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -اَلْمُحَلِّلَ وَالْمُحَلَّلَ لَهُ } رَوَاهُ أَحْمَدُ , وَالنَّسَائِيُّ , وَاَلتِّرْمِذِيُّ وَصَحَّحَهُ [1] .
Narrated Ibn Mas'ud (RA): Allah's Messenger (ﷺ) cursed the man who made a woman lawful for her first husband and the one for whom she was made lawful (the men involved in Halalah). [Reported by Ahmad, an-Nasa'i and at-Tirmidhi; the latter declared it to be Sahih (authentic)].
Sunnah.com reference: Book 8, Hadith 35