Muwatta Imam Malik (Riwayat Yahya)

Imam Malik, may Allah have mercy on him, said that if a slave or slave-girl who comes into the house and whose master trusts him/her steals something from his master, his/her hand should not be cut off. Similarly, if a slave or slave-girl who does not come and go, and is not trusted, steals his master's property, his/her hand should also not be cut off. But if he/she steals the property of his master's wife or if a slave-girl steals the property of her mistress's husband, then the hand should be cut off.