Sahl bin Saad reported,

A man from the Ansar came to the Messenger of Allah ﷺ and said, "Messenger of Allah, what do you say about a man who finds another man with his wife? Should he kill him, or what should he do?"Then Allah revealed concerning his case what is mentioned in the Quran about the Mutalaineen. The Prophet ﷺ said to him, "Allah has issued His ruling concerning you and your wife."So they performed the mutual cursing in the mosque while I was present. When they had finished, the man said, "I have lied about her, Messenger of Allah, if I keep her." Then he divorced her three times before the Messenger of Allah ﷺ commanded him to do so, right after they had completed the mutual cursing. So he separated from her in the presence of the Prophet ﷺ, and the Prophet said, "That is the separation between every couple who engage in mutual cursing."Ibn Jurayj said, Ibn Shihab said, "The practice afterwards became that the two who perform mutual cursing are separated from one another. She was pregnant at the time, and her son was called by his mother's name." He said, "Then the established practice regarding her inheritance became that she inherits from him and he inherits from her whatever Allah has prescribed for him."Ibn Jurayj reported from Ibn Shihab from Sahl bin Saad al-Saidi in this hadith that the Prophet ﷺ said, "If she gives birth to a child who is red and short, resembling a wahrah lizard, then I see that she has told the truth and he has lied about her. But if she brings forth a child who is dark, large-eyed, and broad-buttocked, then I see that he has told the truth about her." She then gave birth to the child bearing the disliked features.

Bukhari 5309

Sahih

حدثنا يحيى أخبرنا عبد الرزاق أخبرنا ابن جريج قال أخبرني ابن شهاب عن الملاعنة وعن السنة فيها عن حديث

سهل بن سعد أخي بني ساعدة

أن رجلا من الأنصار جاء إلى رسول الله ﷺ فقال يا رسول الله أرأيت رجلا وجد مع امرأته رجلا أيقتله أم كيف يفعل فأنزل الله في شأنه ما ذكر في القرآن من أمر المتلاعنين فقال النبي ﷺ قد قضى الله فيك وفي امرأتك قال فتلاعنا في المسجد وأنا شاهد فلما فرغا قال كذبت عليها يا رسول الله إن أمسكتها فطلقها ثلاثا قبل أن يأمره رسول الله ﷺ حين فرغا من التلاعن ففارقها عند النبي ﷺ فقال ذاك تفريق بين كل متلاعنين قال ابن جريج قال ابن شهاب فكانت السنة بعدهما أن يفرق بين المتلاعنين وكانت حاملا وكان ابنها يدعى لأمه قال ثم جرت السنة في ميراثها أنها ترثه ويرث منها ما فرض الله له قال ابن جريج عن ابن شهاب عن سهل بن سعد الساعدي في هذا الحديث إن النبي ﷺ قال إن جاءت به أحمر قصيرا كأنه وحرة فلا أراها إلا قد صدقت وكذب عليها وإن جاءت به أسود أعين ذا أليتين فلا أراه إلا قد صدق عليها فجاءت به على المكروه من ذلك

البخاري 5309صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Divorce
Chapter
Invoking mutual curses in the masjid
Numbering
Darussalam 5309
Bukhari 5309