Maliks Muwatta Book 041, Hadith Number 024.

Section : What Obliges Cutting Off the Hand.

Yahya related to me from Malik from Yahya ibn Said from Amra bint Abd ar-Rahman that A'isha, the wife of the Prophet, may Allah bless him and grant him peace, said, "It has not been a long time for me and I have not forgotten. A thief's hand is cut off for a quarter of a dinar and upwards."