'Labor' in the Bible

Trembling seized them there, pains like those of a woman in labor,

People go out to their work and labor until evening.

He gave to them the land of nations; they inherited the labor of other people

Unless the LORD builds the house, its builders labor uselessly. Unless the LORD guards the city, its security forces keep watch uselessly.

It is useless to get up early and to stay up late, eating the food of exhausting labor truly he gives sleep to those he loves.