It was narrated from Aishah that the Messenger of Allah (S.A.W.) said:
"Do not cut off (the thief's hand) except for something worth one quarter of a Dinar or more (RU)
English reference (RU): Vol. 3, Book 20, Hadith 2585 (RU)
Arabic reference (RU): Book 20, Hadith 2683 (RU)