Jeremiah 9:5

“And they will deceive everyone his neighbour, etc.] 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 weary themselves to commit iniquity; spared no pains to come at it, nor any in it, and go on even to weariness; are more laborious and indefatigable in committing sin than good men are in doing good; which shows great folly and stupidity. The Targum is, “they are become foolish, they have erred.””

“weary themselves--are at laborious pains to act perversely [MAURER]. Sin is a hard bondage (Hab 2:13).”

“From their punishment the prophet now turns to their sins. Jeremiah 9:2 The prophet utters the wish that he might be spared his daily striving, and in some lone wilderness give way to his sorrow, without restraint. A lodging place - It was usual to build in the desert, either by private charity or at the public expense, caravanserais, to receive travelers for a single night, who had however to bring their own supplies with them. An assembly - Or, a gang. Treacherous - Faithless toward one another. Jeremiah 9:3 Rather, “And they bend their tongue to be their bow of lies, i. e.” just as men before a battle get their bows ready, so they of set purpose make ready to do mischief, only their…”

“Weary - They use industry, and contrivance in it, they spare no labour. Jeremiah 9:7”

“they will: Jer 9:5, Jer 9:8; Isa 59:13-15; Mic 6:12; Eph 4:25 deceive: or, mock, Job 11:3 taught: Jer 9:3; Job 15:5; Psa 50:19, Psa 64:3, Psa 140:3; Ti1 4:2 weary: Gen 19:11; Psa 7:14; Pro 4:16; Isa 5:18, Isa 41:6, Isa 41:7, Isa 44:12-14, Isa 57:10; Eze 24:12; Mic 6:3; Hab 2:13 Jeremiah 9:6”