Exodus 16:4
              Then said the LORD unto Moses, Behold, I will rain bread from heaven for you; and the people shall go out and gather a certain rate every day, that I may prove them, whether they will walk in my law, or no. 
           
                
              Exodus 18:20
              And thou shalt teach them ordinances and laws, and shalt show them the way wherein they must walk, and the work that they must do. 
           
                
              Exodus 21:19
              If he rise again, and walk abroad upon his staff, then shall he that smote him be quit: only he shall pay for the loss of his time, and shall cause him to be thoroughly healed.