'Bear Witness' in the Bible

Hear this, O thou house of Jacob; ye that are called by the name of Israel, and are come out of one stock with Judah; which swear by the name of the LORD, and bear witness by the God of Israel - but not with truth and right.

“You have heard [these things foretold]; look at all this [that has been fulfilled].And you, will you not declare it?I proclaim to you [specific] new things from this time,Even hidden things which you have not known.