'Know' in the Bible

"I am about to punish them in such a way," he says, "that they will be looted by their own slaves." Then you will know that the Lord who rules over all has sent me.

"Many nations will join themselves to the Lord on the day of salvation, and they will also be my people. Indeed, I will settle in the midst of you all." Then you will know that the Lord who rules over all has sent me to you.

He replied, "Don't you know what these are?" So I responded, "No, sir."

"The hands of Zerubbabel have laid the foundations of this temple, and his hands will complete it." Then you will know that the Lord who rules over all has sent me to you.

He replied, "Don't you know what these are?" And I said, "No, sir."

Then those who are far away will come and build the temple of the Lord so that you may know that the Lord who rules over all has sent me to you. This will all come to pass if you completely obey the voice of the Lord your God."'"