Muwatta Malik, Book 41, Hadith 1527 (In-Book)

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."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ عَمْرَةَ بِنْتِ عَبْدِ الرَّحْمَنِ، عَنْ عَائِشَةَ، زَوْجِ النَّبِيِّ صلى الله عليه وسلم أَنَّهَا قَالَتْ مَا طَالَ عَلَىَّ وَمَا نَسِيتُ ‏ "‏ الْقَطْعُ فِي رُبُعِ دِينَارٍ فَصَاعِدًا ‏" ‏ ‏.‏

sunnah.com

also referenced under: Book 41, Hadith 24 (USC-MSA)