'Know' in the Bible

For, behold, I will shake mine hand upon them, and they shall be a spoil to their servants: and ye shall know that the LORD of hosts hath sent me.

And many nations shall be joined to the LORD in that day, and shall be my people: and I will dwell in the midst of thee, and thou shalt know that the LORD of hosts hath sent me unto thee.

“Don’t you know what they are?” replied the angel who was speaking with me.I said, “No, my lord.”

The hands of Zerubbabel have laid the foundation of this house; his hands shall also finish it; and thou shalt know that the LORD of hosts hath sent me unto you.

Then he inquired of me, “Don’t you know what these are?”“No, my lord,” I replied.

And they that are far off shall come and build in the temple of the LORD, and ye shall know that the LORD of hosts hath sent me unto you. And this shall come to pass, if ye will diligently obey the voice of the LORD your God.

“but I scattered them with a storm wind among all the nations whom they have not known. Thus the land was desolate after they had gone, so that no one passed through or returned, for they [by their sins] had made the pleasant land desolate and deserted.”

It was broken at that time so the oppressed of the flock who were observing me would know that it had been a message from the LORD.