Sahih al-Bukhari 5307
Narrated Ibn `Abbas:
Hilal bin Umaiyya accused his wife of illegal sexual intercourse and came to the Prophet (ﷺ) to bear 
witness (against her), (taking the oath of Lian). The Prophet (ﷺ) was saying, "Allah knows that either of 
you is a liar. Will anyone of you repent (to Allah)?" Then the lady got up and gave her witness.
حَدَّثَنِي مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ، عَنْ هِشَامِ بْنِ حَسَّانَ، حَدَّثَنَا عِكْرِمَةُ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ أَنَّ هِلاَلَ بْنَ أُمَيَّةَ، قَذَفَ امْرَأَتَهُ، فَجَاءَ فَشَهِدَ وَالنَّبِيُّ صلى الله عليه وسلم يَقُولُ ‏
"‏ إِنَّ اللَّهَ يَعْلَمُ أَنَّ أَحَدَكُمَا كَاذِبٌ، فَهَلْ مِنْكُمَا تَائِبٌ ‏"‏‏.‏ ثُمَّ قَامَتْ فَشَهِدَتْ‏.‏