And if any mischief follow, then thou shalt give life for life,

Jamieson-Fausset-Brown Bible Commentary

23-25. eye for eye-The law which authorized retaliation (a principle acted upon by all primitive people) was a civil one. It was given to regulate the procedure of the public magistrate in determining the amount of compensation in every case of injury, but did not encourage feelings of private revenge. The later Jews, however, mistook it for a moral precept, and were corrected by our Lord (Mt 5:38-42).

Matthew Henry's Concise Commentary

21:22-36 The cases here mentioned give rules of justice then, and still in use, for deciding similar matters. We are taught by these laws, that we must be very careful to do no wrong, either directly or indirectly. If we have done wrong, we must be very willing to make it good, and be desirous that nobody may lose by us.