Cross reference
Job 15:5
5 For your iniquity teaches your mouth, And you choose the language of the crafty.
Job 5:13
13 He takes the wise in their own craftiness; The counsel of the cunning is carried headlong.
James 1:26
26 If anyone among you thinks himself to be religious while he doesn't bridle his tongue, but deceives his heart, this man's religion is worthless.
Luke 6:45
45 The good man out of the good treasure of his heart brings out that which is good, and the evil man out of the evil treasure of his heart brings out that which is evil, for out of the abundance of the heart, his mouth speaks.
Mark 7:21-22
21 For from within, out of the hearts of men, proceed evil thoughts, adulteries, sexual sins, murders, thefts,
22 covetings, wickedness, deceit, lustful desires, an evil eye, blasphemy, pride, and foolishness.
Jeremiah 9:8
8 Their tongue is a deadly arrow; it speaks deceit: one speaks peaceably to his neighbor with his mouth, but in his heart he lays wait for him.
Jeremiah 9:3-5
3 They bend their tongue, [as it were] their bow, for falsehood; and they are grown strong in the land, but not for truth: for they proceed from evil to evil, and they don't know me, says Yahweh.
4 Take you heed everyone of his neighbor, and don't you trust in any brother; for every brother will utterly supplant, and every neighbor will go about with slanders.
5 They will deceive everyone his neighbor, and will not speak the truth: they have taught their tongue to speak lies; they weary themselves to commit iniquity.
Psalms 120:2-3
2 Deliver my soul, Yahweh, from lying lips, From a deceitful tongue.
3 What will be given to you, and what will be done more to you, You deceitful tongue?
Psalms 64:3
3 Who sharpen their tongue like a sword, And aim their arrows, deadly words,
Psalms 52:2-4
2 Your tongue plots destruction, Like a sharp razor, working deceitfully.
3 You love evil more than good, Lying rather than speaking the truth. Selah.
4 You love all devouring words, You deceitful tongue.
Psalms 50:19-20
19 "You give your mouth to evil. You harnesses your tongue for deceit.
20 You sit and speak against your brother. You slander your own mother's son.
Job 12:6
6 The tents of robbers prosper, Those who provoke God are secure; Who carry their God in their hands.
Job 9:22-24
22 "It is all the same. Therefore I say, He destroys the blameless and the wicked.
23 If the scourge kills suddenly, He will mock at the trial of the innocent.
24 The earth is given into the hand of the wicked. He covers the faces of the judges of it. If not he, then who is it?
James 3:5-8
5 So the tongue is also a little member, and boasts great things. See how a small fire can spread to a large forest!
6 And the tongue is a fire. The world of iniquity among our members is the tongue, which defiles the whole body, and sets on fire the course of nature, and is set on fire by Gehenna.{Gehenna is a name that describes a burning Hell with rotting bodies and unclean things in it}
7 For every kind of animal, bird, creeping thing, and thing in the sea, is tamed, and has been tamed by mankind.
8 But nobody can tame the tongue. It is a restless evil, full of deadly poison.