Jacob heard that Laban’s sons were saying, “Jacob has taken everything that belonged to our father, and he has produced all this wealth from our father’s property.”
For here is one who has toiled with wisdom and knowledge and skill, and that one’s legacy must be left to another who has not toiled for it. This also is vanity and a great evil.
For to the one who pleases God, he gives wisdom and knowledge and joy; but to the one who displeases, God gives the task of gathering possessions for the one who pleases God. This also is vanity and a chase after wind.
There is no end to all this people, to all who were before them; yet the later generations will not have joy in him. This also is vanity and a chase after wind. Vanity of Many Words.
unlike Cain who belonged to the evil one and slaughtered his brother. Why did he slaughter him? Because his own works were evil, and those of his brother righteous.