'Poor' in the Bible

Jesus looking at him loved him, and said to him, "One thing you lack. Go, sell whatever you have, and give to the poor, and you will have treasure in heaven; and come, follow me, taking up the cross."

A poor widow came, and she cast in two small brass coins, which equal a quadrans coin.

He called his disciples to himself, and said to them, "Most certainly I tell you, this poor widow gave more than all those who are giving into the treasury,

For this might have been sold for more than three hundred denarii, and given to the poor." They grumbled against her.

For you always have the poor with you, and whenever you want to, you can do them good; but you will not always have me.