'Faithfully' in the Bible

"You are to carry out your duties in the fear of the LORD, serving him faithfully with your whole heart. No matter what case comes before you from your fellow citizens who live in their own cities, whether it's a dispute between blood relatives or a dispute regarding the Law and the commands, statutes, or verdicts, you are to warn the parties so that they do not become guilty in the LORD's presence and so that anger does not come upon you and your fellow citizens.

They faithfully brought in the gifts, tithes, and consecrated materials, and Conaniah the descendant of Levi was placed in charge of them. His brother Shimei was second in command,

Under his authority, Eden, Miniamin, Jeshua, Shemaiah, Amariah, and Shecaniah served in the priestly cities, making sure contributions were distributed faithfully to their relatives division by division, no matter how large or how small,

The workmen did their duties faithfully with these foremen supervising them: Jahath and Obadiah, descendants of Levi who were Merari's sons, Zechariah and Meshullam, descendants of Kohath, and various descendants of Levi, who were skilled musicians.