God wanted Jeremiah to do an investigation in the city:
Jer. 5:1 -5
Run ye to and fro through the streets of Jerusalem, and see now, and know, and seek in the broad places thereof, if ye can find a man, if there be any that executeth judgment, that seeketh the truth; and I will pardon it.
And though they say, The Lord liveth; surely they swear falsely.
O Lord, are not thine eyes upon the truth? thou hast stricken them, but they have not grieved; thou hast consumed them, but they have refused to receive correction: they have made their faces harder than a rock; they have refused to return.
Therefore I said, Surely these are poor; they are foolish: for they know not the way of the Lord, nor the judgment of their God. I will get me unto the great men, and will speak unto them; for they have known the way of the Lord, and the judgment of their God: but these have altogether broken the yoke, and burst the bonds…