R. Gamliel says: "and the owner of the ox is absolved" — from the worth of a man-servant. For it would follow (otherwise), viz.: Since both a mued and a tam are stoned (for killing a man), then if we have learned about mued that he (the owner) pays for the worth of a man-servant, then it should be the same with a tam. It is, therefore, written (in the instance of a tam) "the owner of the ox is absolved" — from the worth of a man-servant.
Rabban Gamliel, Ben Azzai, and Rabbi Akiva Each Identified a Different
Mekhilta Tractate Nezikin 10:16