Wickedness is in the midst thereof - That is, the wickedness connected with rebellion and revolt.
Deceit and guile depart not from her streets - They are everywhere. They are found in every street and alley. They pervade all classes of the people. The word rendered "deceit" means rather "oppression." This was connected with "guile," or with "deceit." That is, wrong would be everywhere committed, and the perpetration of those wrongs would be connected with false representations, and false pretences - a state of things that might be expected in the unnatural rebellion under Absalom.

Wickedness is in the midst thereof,.... All manner of wickedness; abominable wickedness; wickedness as arrived to its highest pitch, and as having filled up its measure; see Ezekiel 9:4;
deceit and guile depart not from her streets; where truth was fallen, and equity could not enter, Isaiah 59:14; for these are contrary the one to the other, and are incompatible; where the one prevails, the other must give way. This whole account shows the aboundings of sin in Jerusalem at this time, and that it was openly and publicly committed, and contains so many reasons of the imprecations in Psalm 55:9.

Wickedness--literally, "Mischief," evils resulting from others (Psalm 5:9; Psalm 52:2, Psalm 52:7).
streets--or literally, "wide places," markets, courts of justice, and any public place.

Streets - The places of buying and selling, and of public commerce.