For their heart studieth destruction, and their lips talk of mischief.

For their heart studieth oppression, And their lips talk of mischief.

Because their mind studieth robberies, and their lips speak deceits.

For destruction doth their heart meditate, And perverseness do their lips speak.

For their heart studies destruction, and their lips talk of mischief.

For the purposes of their hearts are destruction, and their lips are talking of trouble.

For their mind meditates on robberies, and their lips speak deceptions.

For their heart studieth destruction,.... To others; to good men, that separate from them, and reprove them, or are in their way; or any ways hinder them in the prosecution of their wicked designs; as Haman's heart studied the destruction of the Jews: or their hearts study to draw men into their destructive methods of living, and therefore should be shunned and avoided. Moreover, their hearts study destruction to themselves; they study what they shall eat and drink, which they pursue to intemperance; and how they shall compass their lewd designs, and which issue in their ruin; destruction and misery are in all the ways they devise and walk in;
and their lips talk of mischief; which they study in their hearts against others; as are their hearts, so are their lips; out of the abundance of the wickedness of their hearts their mouths speak mischievous things; and which, though they design for others, oftentimes fall upon themselves.

studieth--meditateth.
talk . . . mischief--Their expressed purposes are to do evil.

Destruction - How they may oppress and destroy others.