"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." (Using translation from Nasāʾī 4948)
لَا قَطْعَ إِلَّا فِي ثَمَنِ الْمِجَنِّ وَثَمَنُهُ يَوْمَئِذٍ دِينَارٌ وَقَفَهُ جَرِيرٌ