'Serves' in the Bible

But ye shall not be thus; but let the greater among you be as the younger, and the leader as he that serves.

For which is greater, he that is at table or he that serves? Is not he that is at table? But I am in the midst of you as the one that serves.

but he who serves for wages, and who is not the shepherd, whose own the sheep are not, sees the wolf coming, and leaves the sheep and flees; and the wolf seizes them and scatters the sheep.

Now he who serves for wages flees because he serves for wages, and is not himself concerned about the sheep.

For he that in this serves the Christ is acceptable to God and approved of men.