'Closed' in the Bible

I saw in the right hand of Him who was seated on the throne a scroll written on the inside and on the back, closed and sealed with seven seals.

He threw him into the abyss, closed it, and put a seal on it so that he would no longer deceive the nations until the 1,000 years were completed. After that, he must be released for a short time.

In the daytime (for there will be no night there) its gates will never be closed;