Sayyiduna Ali (may Allah be pleased with him) says: The Prophet (peace and blessings be upon him) had (a thief's hand) cut off for (stealing) an iron helmet whose value was twenty-one dirhams.
Al-Bazzar recorded it. Its chain contains al-Mukhtar bin Nafi', who is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الحدود والديات / 10649