'Observe' in the Bible

"The Israelites are to observe the Passover at its appointed time.

In the fourteenth day of this month, at twilight, you are to observe it at its appointed time; you must keep it in accordance with all its statutes and all its customs."

So Moses instructed the Israelites to observe the Passover.

"Tell the Israelites, 'If any of you or of your posterity become ceremonially defiled by touching a dead body, or are on a journey far away, then he may observe the Passover to the Lord.

They may observe it on the fourteenth day of the second month at twilight; they are to eat it with bread made without yeast and with bitter herbs.

They must not leave any of it until morning, nor break any of its bones; they must observe it in accordance with every statute of the Passover.

"'If you sin unintentionally and do not observe all these commandments that the Lord has spoken to Moses --

Balak said to him, "Please come with me to another place from which you can observe them. You will see only a part of them, but you will not see all of them. Curse them for me from there."