'Generations' in the Bible

Who hath wrought and done it, calling the generations from the beginning? I the LORD, the first, and with the last; I am he.

Awake, awake, put on strength, O arm of the LORD; awake, as in the ancient days, in the generations of old. Art thou not it that hath cut Rahab, and wounded the dragon?

And they that shall be of thee shall build the old waste places: thou shalt raise up the foundations of many generations; and thou shalt be called, The repairer of the breach, The restorer of paths to dwell in.

Whereas thou hast been forsaken and hated, so that no man went through thee, I will make thee an eternal excellency, a joy of many generations.

And they shall build the old wastes, they shall raise up the former desolations, and they shall repair the waste cities, the desolations of many generations.