It was narrated that 'Abdur-Rahman bin Muhairiz said: "I said to Fadalah bin 'Ubaid: 'Do you think that hanging the hand from the thief's neck is Sunnah?' He said: 'Yes; a thief was brought to the Messenger of Allah (ﷺ) and he cut off his hand and hung it from his neck."' (Daif) Abu 'Abdur-Rahman (An-Nasai) said; Al-Hajjaj bin Artah is weak, his narrations are not used as proof.
Source: sunnah.com
Other translations
Arabic
أَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنِي عُمَرُ بْنُ عَلِيٍّ الْمُقَدَّمِيُّ، قَالَ حَدَّثَنَا الْحَجَّاجُ، عَنْ مَكْحُولٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ مُحَيْرِيزٍ، قَالَ قُلْتُ لِفَضَالَةَ بْنِ عُبَيْدٍ أَرَأَيْتَ تَعْلِيقَ الْيَدِ فِي عُنُقِ السَّارِقِ مِنَ السُّنَّةِ هُوَ قَالَ نَعَمْ أُتِيَ رَسُولُ اللَّهِ صلى الله عليه وسلم بِسَارِقٍ فَقَطَعَ يَدَهُ وَعَلَّقَهُ فِي عُنُقِهِ . قَالَ أَبُو عَبْدِ الرَّحْمَنِ الْحَجَّاجُ بْنُ أَرْطَاةَ ضَعِيفٌ وَلاَ يُحْتَجُّ بِحَدِيثِهِ .
sunnah.com