Narrated by:Ayman bin Umm Ayman who attributed it to the Prophet said
It was narrated that Ayman bin Umm Ayman who attributed it to the Prophet said:"The (hand of) a thief is not to be cut off except for the price of a shield, and in those days the price of a shield was a Dinar."
أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ، قَالَ أَنْبَأَنَا شَرِيكٌ، عَنْ مَنْصُورٍ، عَنْ عَطَاءٍ، وَمُجَاهِدٍ، عَنْ أَيْمَنَ بْنِ أُمِّ أَيْمَنَ، يَرْفَعُهُ قَالَ " لاَ تُقْطَعُ الْيَدُ إِلاَّ فِي ثَمَنِ الْمِجَنِّ " . وَثَمَنُهُ يَوْمَئِذٍ دِينَارٌ .
Nesai
The Book of Cutting off the Hand of the Thief • Hadith 4948