Jeremiah
Jeremiah 9:5BSB·traditional attribution

Each one betrays his friend; no one tells the truth. They have taught their tongues to lie; they wear themselves out committing iniquity.

John Calvin Reformed @genevareformer

Jeremiah goes on with the same subject. He says that fidelity had so disappeared among the Jews, that every one endeavored to deceive his neighbor. Hence it followed, that they were withhout any shame. Some sense of shame at least remains among men, when they have to do with their own friends; for though they may be wholly given to gain, and to indulge in...

Matthew Henry Presbyterian @wholebiblehenry

The prophet, being commissioned both to foretel the destruction coming upon Judah and Jerusalem and to point out the sin for which that destruction was brought upon them, here, as elsewhere, speaks of both very feelingly: what he said of both came from the heart, and therefore one would have thought it would reach to the heart. I.

Commenting on Jeremiah 9:1-11

John Gill Reformed Baptist @doctorgill

And they will deceive everyone his neighbour,.... In conversation, with lying words; and in trade and commerce, by art and tricking: and will not speak the truth; with respect to facts they report, or goods they sell: they have taught their tongue to speak lies; and become so accustomed to lying that they cannot do otherwise; it is as it were natural to them: and...