Jaibir reported that a woman from the tribe of Makhzum committed theft. She was brought to Allah's Messenger (ﷺ) and she sought refuge (intercession) from Umm Salama, the wife of Allah's Messenger (ﷺ). Thereupon Allah's Messenger (ﷺ) said: By Allah, even if she were Fatima, I would have her hand cut off. And thus her hand was cut off.
Source: sunnah.com
Other translations
Arabic
وَحَدَّثَنِي سَلَمَةُ بْنُ شَبِيبٍ، حَدَّثَنَا الْحَسَنُ بْنُ أَعْيَنَ، حَدَّثَنَا مَعْقِلٌ، عَنْ أَبِي الزُّبَيْرِ، عَنْ جَابِرٍ، أَنَّ امْرَأَةً، مِنْ بَنِي مَخْزُومٍ سَرَقَتْ فَأُتِيَ بِهَا النَّبِيُّ صلى الله عليه وسلم فَعَاذَتْ بِأُمِّ سَلَمَةَ زَوْجِ النَّبِيِّ صلى الله عليه وسلم فَقَالَ النَّبِيُّ صلى الله عليه وسلم " وَاللَّهِ لَوْ كَانَتْ فَاطِمَةُ لَقَطَعْتُ يَدَهَا " . فَقُطِعَتْ .
sunnah.com