'Observing' in the Bible

because they have forsaken Me, and have worshiped Ashtoreth the goddess of the Sidonians, Chemosh the god of Moab, and Milcom the god of the sons of Ammon; and they have not walked in My ways, doing what is right in My sight and observing My statutes and My ordinances, as his father David did.

Then it will be, that if you listen to all that I command you and walk in My ways, and do what is right in My sight by observing My statutes and My commandments, as My servant David did, then I will be with you and build you an enduring house as I built for David, and I will give Israel to you.