'Known' in the Bible

Will ye steal, murder, and commit adultery, and swear falsely, and burn incense unto Baal, and walk after other gods that ye have not known,

I will scatter them also among the nations, whom neither they nor their fathers have known; and I will send the sword after them, till I have consumed them.

therefore will I cast you forth out of this land into the land that ye have not known, neither ye nor your fathers; and there shall ye serve other gods day and night; for I will show you no favor.

The prophet that prophesieth of peace, when the word of the prophet shall come to pass, then shall the prophet be known, that Jehovah hath truly sent him.