Exodus 21:36
Or if it is known that the ox was previously in the habit of goring, and its owner has not kept it confined, he must make restitution of ox for ox, and the dead [animal] shall be his.
Treasury of Scripture Knowledge
Summary
Or if it be known that the ox hath used to push in time past, and his owner hath not kept him in; he shall surely pay ox for ox; and the dead shall be his own.
General references
Bible References
General references
Exodus 21:29
But if the ox has tried to gore on a previous occasion, and its owner has been warned, but has not kept it confined and it kills a man or a woman, the ox shall be stoned and its owner shall be put to death as well.