Exodus 21:18-19

18Perhaps two men argue and they fight one another. One man might hit the other man with a stone or with his fist. The man that he hit might not die but he might have to stay in bed for some time.

19After that, he may get up. He may be able to walk about outside, if he uses a stick. Then the man who hit him is not guilty. But he must pay the man that he has hurt. He must pay him for the time that he has not been able to work. He must also make sure that the man becomes completely well again.