Sunan an Nasai 4943
The Book of Cutting off the Hand of the Thief
وَأَخْبَرَنَا مَحْمُودُ بْنُ غَيْلاَنَ، قَالَ حَدَّثَنَا مُعَاوِيَةُ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنْ مَنْصُورٍ، عَنْ مُجَاهِدٍ، عَنْ عَطَاءٍ، عَنْ أَيْمَنَ، قَالَ لَمْ يَقْطَعِ النَّبِيُّ صلى الله عليه وسلم السَّارِقَ إِلاَّ فِي ثَمَنِ الْمِجَنِّ وَثَمَنُ الْمِجَنِّ يَوْمَئِذٍ دِينَارٌ .
It was narrated that Ayman said:"The Prophet did not cut off the (hand of) the thief except for the value of a shield, and the value of a shield in those days was a Dinar." (Daif)
Grading: Abu Ghuddah: Munkar · Al-Albani: Munkar · Zubair Ali Zai: Daif
Text from the public-domain hadith-api dataset. Numbering follows that dataset and can differ by a few from some printed editions — check the wording, not only the number.