Sunan Ibn Majah Book 20, Hadith 2560

حَدَّثَنَا أَبُو بَكْرِ بْنُ خَلاَّدٍ الْبَاهِلِيُّ، حَدَّثَنَا سُفْيَانُ، عَنْ أَبِي الزِّنَادِ، عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ، قَالَ ذَكَرَ ابْنُ عَبَّاسٍ الْمُتَلاَعِنَيْنِ ‏.‏ فَقَالَ لَهُ ابْنُ شَدَّادٍ هِيَ الَّتِي قَالَ لَهَا رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ لَوْ كُنْتُ رَاجِمًا أَحَدًا بِغَيْرِ بَيِّنَةٍ لَرَجَمْتُهَا ‏"‏ ‏.‏ فَقَالَ ابْنُ عَبَّاسٍ تِلْكَ امْرَأَةٌ أَعْلَنَتْ ‏.‏

It was narrated that Qasim bin Muhammad said:“Ibn `Abbas mentioned two people who had engaged in the process of Li`an. Ibn Shaddad said to him: 'Is this the one of whom the Messenger of Allah (ﷺ) said: “If I were to stone anyone without proof I would have stoned so-and-so.” Ibn`Abbas said: 'No, that was a woman who, (although she was a Muslim), used to expose herself.'”