'Poor' in the Bible

Jehovah maketh poor, and maketh rich: He bringeth low, he also lifteth up.

He raiseth up the poor out of the dust, He lifteth up the needy from the dunghill, To make them sit with princes, And inherit the throne of glory: For the pillars of the earth are Jehovah's, And he hath set the world upon them.

And Saul's servants spake those words in the ears of David. And David said, Seemeth it to you a light thing to be the king's son-in-law, seeing that I am a poor man, and lightly esteemed?