'Tide' in the Bible

"Therefore this is what the Lord GOD says: "Watch out! I'm coming to get you, Tyre! I'm about to bring many nations to attack you. They'll come in wave after wave, like the advancing tide,

For they [the gifts, sacrifices, and ceremonies] deal only with [clean and unclean] food and drink and various ritual washings, [mere] external regulations for the body imposed [to help the worshipers] until the time of reformation [that is, the time of the new order when Christ will establish the reality of what these things foreshadow—a better covenant].