Musannaf Ibn Abi Shayba 18:513

Abu Bakr narrated to us, he said: Muhammad bin Bakr narrated to us, from Ibn Jurayj, he said: I said to 'Ata': "A slave wounds a free man or gouges out his eye, and the free man wants to seek retaliation (qisas) from the slave." He said: "A free man does not seek retaliation from a slave." Mujahid and Sulayman bin Musa said the same.