"I asked Fadalah bin 'Ubaid about hanging the hand around the neck of the thief: 'Is this from the Sunnah?' He said: 'A man came to the Messenger of Allah ﷺ with a thief so his hand was cut off, and then he ordered that it be hung around his neck.'"
عَنْ تَعْلِيقِ الْيَدِ فِي عُنُقِ السَّارِقِ أَمِنَ السُّنَّةِ هُوَ قَالَ أُتِيَ رَسُولُ اللَّهِ ﷺ بِسَارِقٍ فَقُطِعَتْ يَدُهُ ثُمَّ أَمَرَ بِهَا فَعُلِّقَتْ فِي عُنُقِهِ
We asked Fadalah b. 'Ubaid about the hanging the (amputated) hand on the neck of a thief whether it was a sunnan. He said: A thief was brought to the Messenger of Allah ﷺ and his hand was cut off. Thereafter he commanded for it, and it was hung on his neck.
عَنْ تَعْلِيقِ الْيَدِ فِي الْعُنُقِ لِلسَّارِقِ أَمِنَ السُّنَّةِ هُوَ قَالَ أُتِيَ رَسُولُ اللَّهِ ﷺ بِسَارِقٍ فَقُطِعَتْ يَدُهُ ثُمَّ أُمِرَ بِهَا فَعُلِّقَتْ فِي عُنُقِهِ