'Labor' in the Bible

"Isn't a man forced to labor on earth? Aren't his days like the days of a hired hand?

I shall be condemned. Why then do I labor in vain?

They bow themselves, they bring forth their young, they end their labor pains.

Will you trust him, because his strength is great? Or will you leave to him your labor?

She deals harshly with her young ones, as if they were not hers. Though her labor is in vain, she is without fear,