Narrated AbuHurayrah:
The Prophet (ﷺ) said: There are three things which, whether undertaken seriously or in jest, are treated as serious: Marriage, divorce and taking back a wife (after a divorce which is not final)
حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا حَاتِمُ بْنُ إِسْمَاعِيلَ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ حَبِيبِ بْنِ أَرْدَكَ، حَدَّثَنَا عَطَاءُ بْنُ أَبِي رَبَاحٍ، عَنْ يُوسُفَ بْنِ مَاهَكَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " ثَلاَثٌ جِدُّهُنَّ جِدٌّ وَهَزْلُهُنَّ جِدٌّ النِّكَاحُ وَالطَّلاَقُ وَالرَّجْعَةُ "…
It was narrated from Abu Hurairah that:
the Messenger of Allah (ﷺ) said: "There are three matters in which seriousness is serious and joking is serious: marriage, divorce and taking back (one's wife). "
Abu Hurairah narrated that:
The Messenger of Allah (ﷺ) said: "Three are serious when they are serious, and serious when they are in jest: Marriage, divorce, and return."