That as all in fecundity and sterility arises from a neglect of sowing and planting land a second time, he may be kept continually in mind of his wicked murder, and self-blamed for it; since the ground was not to be the same for the future, after it was compelled, contrary to its nature, to drink of human blood, to bring forth food to that man who imbued it with the polluted stain of blood.
Why he who knows all things asks the fratricide: "Where is thy brother Abel?" (Genesis 4:10).