'Observed' in the Bible

and ye have observed the unleavened things, for in this self-same day I have brought out your hosts from the land of Egypt, and ye have observed this day to your generations -- a statute age-during.

And ye have observed this thing, for a statute to thee, and to thy sons -- unto the age;

and the sons of Israel have observed the sabbath; to keep the sabbath to their generations is a covenant age-during,