'Thousand' in the Bible

And he gave them leave. And the unclean spirits came out, and entered into the swine: and the herd rushed down the steep into the sea, in number about two thousand; and they were drowned in the sea.

And they that ate the loaves were five thousand men.

And they were about four thousand: and he sent them away.

When I brake the five loaves among the five thousand, how many baskets full of broken pieces took ye up? They say unto him, Twelve.

And when the seven among the four thousand, how many basketfuls of broken pieces took ye up? And they say unto him, Seven.