'Labour' in the Bible

I -- I am become wicked; why is this? In vain I labour.

Is it good for Thee that Thou dost oppress? That Thou despisest the labour of Thy hands, And on the counsel of the wicked hast shone?

Dost thou trust in him because great is his power? And dost thou leave unto him thy labour?

Her young ones it hath hardened without her, In vain is her labour without fear.