Commanding those who are involved in a case of Li'an to take the oath.

Sahih al-Bukhari · Book 68 · Hadith 5306

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلُ، حَدَّثَنَا جُوَيْرِيَةُ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ ـ رضى الله عنه ـ أَنَّ رَجُلاً مِنَ الأَنْصَارِ قَذَفَ امْرَأَتَهُ فَأَحْلَفَهُمَا النَّبِيُّ صلى الله عليه وسلم ثُمَّ فَرَّقَ بَيْنَهُمَا‏.‏

Narrated `Abdullah: An Ansari man accused his wife (of committing illegal sexual intercourse). The Prophet (ﷺ) made both of them takes the oath of Lian, and separated them from each other (by divorce).