Exodus 21:28; Exodus 21:29

28 "If an ox gores a man or a woman to death, the ox shall surely be stoned and its flesh shall not be eaten; but the owner of the ox shall go unpunished.

29 "If, however, an ox was previously in the habit of goring and its owner has been warned, yet he does not confine it and it kills a man or a woman, the ox shall be stoned and its owner also shall be put to death.