'Serving' in the Bible

But Martha was cumbered about much serving; and she came up to him, and said, Lord, dost thou not care that my sister did leave me to serve alone? bid her therefore that she help me.

serving the Lord with all lowliness of mind, and with tears, and with trials which befell me by the plots of the Jews;

unto which promise our twelve tribes, earnestly serving God night and day, hope to attain. And concerning this hope I am accused by the Jews, O king!

in diligence not slothful; fervent in spirit; serving the Lord;

For we also once were foolish, disobedient, deceived, serving divers lusts and pleasures, living in malice and envy, hateful, hating one another.