'Knowledge' in the Bible

Hear the word of the LORD, ye children of Israel: for the LORD hath a controversy with the inhabitants of the land, because there is no truth, nor mercy, nor knowledge of God in the land.

My people are destroyed for lack of knowledge: because thou hast rejected knowledge, I will also reject thee, that thou shalt be no priest to me: seeing thou hast forgotten the law of thy God, I will also forget thy children.

For I desired mercy, and not sacrifice; and the knowledge of God more than burnt offerings.