'Generations' in the Bible

Whose purpose and work was it? His who sent out the generations from the start. I the Lord, the first, and with the last, I am he.

For like a coat they will be food for the insect, the worm will make a meal of them like wool: but my righteousness will be for ever, and my salvation to all generations.

Awake! awake! put on strength, O arm of the Lord, awake! as in the old days, in the generations long past. Was it not by you that Rahab was cut in two, and the dragon Wounded?

And your sons will be building again the old waste places: you will make strong the bases of old generations: and you will be named, He who puts up the broken walls, and, He who makes ready the ways for use.

And they will be building again the old broken walls, and will make new the old waste places, and will put up again the towns which have been waste for long generations.