'Service' in the Bible

Fulfil the week with this one: then we will give thee the other one also, for the service that thou shalt serve me yet seven other years.

Give me my wives for whom I have served thee, and my children; that I may go away, for thou knowest my service which I have served thee.

These are the generations of Jacob. Joseph, being seventeen years old, fed the flock with his brethren; and he was doing service with the sons of Bilhah, and with the sons of Zilpah, his father's wives. And Joseph brought to his father an evil report of them.