Jeremiah 9 (KJV)

3 And they bend their tongues like their bow for lies: but they are not valiant (worthy, courageous) for the truth upon the earth; for they proceed from evil to evil, and they know not me, saith the Lord.

4 Take ye heed every one of his neighbour, and trust ye not in any brother: for every brother will utterly supplant (override), and every neighbour will walk with slanders.
5 And they will deceive every one his neighbour, and will not speak the truth: they have taught their tongue to speak lies, and weary themselves to commit iniquity.

6 Thine habitation is in the midst of deceit; through deceit they refuse to know me, saith the Lord.
7 Therefore thus saith the Lord of hosts, Behold, I will melt them, and try them; for how shall I do for the daughter of my people?
8 Their tongue is as an arrow shot out; it speaketh deceit: one speaketh peaceably to his neighbour with his mouth, but in heart he layeth his wait.
9 Shall I not visit them for these things? saith the Lord: shall not my soul be avenged on such a nation as this?

23 Thus saith the Lord, Let not the wise man glory in his wisdom, neither let the mighty man glory in his might, let not the rich man glory in his riches:
24 But let him that glorieth glory in this, that he understandeth and knoweth me, that I am the Lord which exercise lovingkindness, judgment, and righteousness, in the earth: for in these things I delight, saith the Lord.