كتاب النكاح
8  
Marriage
Bulugh al-Maram 1077
al-Harith bin Abu Usamah reported from the Hadith of 'Ubadah bin as-Samit [RA) - tracing it to the Prophet (ﷺ):
"It is not permissible to play in three things: divorce, marriage and emancipation. Therefore, whoever pronounce (either of) them, they certainly become binding." [Its chain of narrators is Da'if (weak)].
وَلِلْحَارِثِ اِبْنِ أَبِي أُسَامَةَ : مِنْ حَدِيثِ عُبَادَةَ بْنِ اَلصَّامِتِ رَفَعَهُ : { لَا يَجُوزُ اَللَّعِبُ فِي ثَلَاثٍ : اَلطَّلَاقُ , وَالنِّكَاحُ , وَالْعِتَاقُ , فَمَنْ قَالَهُنَّ فَقَدَ وَجَبْنَ } وَسَنَدُهُ ضَعِيفٌ 1‏ .‏
Reference : Bulugh al-Maram 1077
In-book reference : Book 8, Hadith 1077
English translation : Book 8, Hadith 1088
Hadith Text
Reference