'Observed' in the Bible

[you] who received the law by directions of angels and have not observed [it]!"

Now while Paul was waiting for them in Athens, his spirit was provoked within him [when he] observed the city was full of idols.

If then Demetrius and the craftsmen [who are] with him have a complaint against anyone, the court days are observed and there are proconsuls--let them bring charges against one another!