'Vanity' in the Bible

For {Egyptians} help [with] vanity and emptiness, therefore I have called this one "Rahab, they [are] sitting."

But I myself said, "I have labored in vain; I have used up my strength for nothing and vanity! Nevertheless, my justice [is] with Yahweh, and my reward [is] with my God."

There is nobody {who pleads with} justice, and there is nobody who judges with honesty. They rely on nothing and speak vanity. They conceive trouble and beget iniquity;