If the man confess to zina but the woman does not
حَدَّثَنَا مُحَمَّدُ بْنُ يَحْيَى بْنِ فَارِسٍ، حَدَّثَنَا مُوسَى بْنُ هَارُونَ الْبُرْدِيُّ، حَدَّثَنَا هِشَامُ بْنُ يُوسُفَ، عَنِ الْقَاسِمِ بْنِ فَيَّاضٍ الأَبْنَاوِيِّ، عَنْ خَلاَّدِ بْنِ عَبْدِ الرَّحْمَنِ، عَنِ ابْنِ الْمُسَيَّبِ، عَنِ ابْنِ عَبَّاسٍ، أَنَّ رَجُلاً، مِنْ بَكْرِ بْنِ لَيْثٍ أَتَى النَّبِيَّ صلى الله عليه وسلم فَأَقَرَّ أَنَّهُ زَنَى بِامْرَأَةٍ أَرْبَعَ مَرَّاتٍ فَجَلَدَهُ مِائَةً وَكَانَ بِكْرًا ثُمَّ سَأَلَهُ الْبَيِّنَةَ عَلَى الْمَرْأَةِ فَقَالَتْ كَذَبَ وَاللَّهِ يَا رَسُولَ اللَّهِ فَجَلَدَهُ حَدَّ الْفِرْيَةِ ثَمَانِينَ .
Narrated Abdullah ibn Abbas: A man of Bakr ibn Layth came to the Prophet (ﷺ) and made confession four times that he had committed fornication with a woman, so he had a hundred lashes administered to him. The man had not been married. He then asked him to produce proof against the woman, and she said: I swear by Allah, Messenger of Allah, that he has lied. Then he was given the punishment of eighty lashes of falsehood.