صحيح البخاري Sahih Bukhari كتاب الصلاة The Book of As-Salat (The Prayer)
بَابُ الْقَضَاءِ وَاللِّعَانِ فِي الْمَسْجِدِ بَيْنَ الرِّجَالِ وَالنِّسَاءِ:

(44) Chapter. To give the judicial verdicts in the mosque and to perform the Al-Lian between men and women (husbands and wives) there.

1 hadith
Hadith 423
حَدَّثَنَا يَحْيَى ، قَالَ : أَخْبَرَنَا عَبْدُ الرَّزَّاقِ ، قَالَ : أَخْبَرَنَا ابْنُ جُرَيْجٍ ، قَالَ : أَخْبَرَنِي ابْنُ شِهَابٍ ، عَنْ سَهْلِ بْنِ سَعْدٍ ، أَنَّ رَجُلًا ، قَالَ : " يَا رَسُولَ اللَّهِ ، أَرَأَيْتَ رَجُلًا وَجَدَ مَعَ امْرَأَتِهِ رَجُلًا ، أَيَقْتُلُهُ ؟ فَتَلَا عَنَا فِي الْمَسْجِدِ ، وَأَنَا شَاهِدٌ " .
Narrated Sahl bin Sa`d: A man said, "O Allah's Apostle! If a man finds another man with his wife, (committing adultery) should the husband kill him?" Later on I saw them (the man and his wife) doing Li`an in the mosque (taking oaths, one accusing, and the other denying adultery).
Hadith Reference Sahih Bukhari / The Book of As-Salat (The Prayer) / Hadith: 423
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة