'Serving' in the Bible

Jehovah they are fearing, and their gods they are serving, according to the custom of the nations whence they removed them.

These nations are worshiping the Lord and at the same time serving their idols; their sons and grandsons do just as their fathers have done, to this very day.

because he completely adopted his father's lifestyle, serving the same idols his father had served and worshipped.