'Offspring' in the Bible

“You will know also that your descendants will be many,And your offspring as the grass of the earth.

“Their children and descendants are established with them in their sight,And their offspring before their eyes.

“Though his children are many, they are destined for the sword;And his descendants will not have sufficient bread.

Then let me plant and [let] another eat [from the results of my labor],And let my crops be uprooted and ruined.

“Can you count the months that they carry offspring,Or do you know the time when they give birth?