'Thousand' in the Bible

Jehovah, the God of your fathers, make you a thousand times as many as ye are, and bless you, as he hath promised you!

Know therefore that Jehovah thy God, he is God, the faithful God, who keepeth covenant and lovingkindness with them that love him and keep his commandments to a thousand generations,

How should one chase a thousand, And two put ten thousand to flight, Except their Rock had sold them, And Jehovah had delivered them up?