Proverbs 17:20
He that hath a froward heart findeth no good: and he that hath a perverse tongue falleth into mischief.
Cross-reference
Proverbs 3:32 uses the same term 'devious' — the crooked person is an abomination to God, contrasting with the upright who receive His confidence.
Proverbs 6:12-15 describes a worthless person with crooked speech and gestures, who will suddenly be broken — the same portrait of the wicked man headed for disaster.
Proverbs 10:10 warns that a wink (deceit) causes trouble and a babbling fool comes to ruin — mirroring the crooked heart and dishonest tongue’s calamity.
Proverbs 10:14 says the fool’s mouth brings ruin near — the same consequence as the dishonest tongue falling into calamity.
Proverbs 10:31 states the perverse tongue will be cut off — a specific punishment echoing the calamity that comes to the dishonest tongue.
Proverbs 18:6 shows a fool’s lips invite a beating — the same idea that dishonest speech leads to physical harm, as in falling into calamity.
Proverbs 18:7 says a fool’s mouth is his ruin and a snare to his soul — directly parallel to the dishonest tongue falling into calamity.
Proverbs 4:24 commands to put away crooked speech, directly reinforcing the warning against a dishonest tongue in this verse.
Proverbs 8:13 lists perverted speech as something God hates, connecting the dishonest tongue of 17:20 to the fear of the Lord.
Psalm 18:26 says God shows Himself twisted to the crooked — the same Hebrew root, reinforcing that a crooked heart meets divine opposition.
Ecclesiastes 10:12 contrasts wise words winning favor with fool’s lips consuming him — the same ruinous outcome for corrupt speech.
James 3:6-8 depicts the tongue as a fire corrupting the whole body, echoing the warning that a dishonest tongue leads to calamity.
Psalm 140:11 prays that slanderers not be established, aligning with the proverb's warning that dishonest speech leads to downfall.
In Job 9:20, Job says his own mouth condemns him, showing speech can bring trouble—parallel to the dishonest tongue causing calamity.
Jeremiah 23:36 condemns perverting God's words, linking to the dishonest tongue and the calamity that follows for false prophets.