Muwatta Imam Malik (Riwayat Yahya)

Imam Malik, may Allah have mercy on him, said that if a man intentionally puts out his wife's eye, breaks her hand, or cuts off her finger, then retribution (qisas) will be taken from him. However, if he strikes his wife with a rope or whip as a warning and, unintentionally, it hits a place causing a wound or damage, then blood money (diyah) will be obligatory, not retribution (qisas).