'Poor' in the Bible

So the Lord sent Nathan to David. When he arrived, he said to him:There were two men in a certain city, one rich and the other poor.

but the poor man had nothing except one small ewe lamb that he had bought. He raised it, and it grew up, living with him and his children. It shared his meager food and drank from his cup; it slept in his arms, and it was like a daughter to him.

Now a traveler came to the rich man, but the rich man could not bring himself to take one of his own sheep or cattle to prepare for the traveler who had come to him. Instead, he took the poor man’s lamb and prepared it for his guest.