Behold the mounts, they are come unto the city to take it; and the city is given into the hand of the Chaldeans, that fight against it, because of the sword, and of the famine, and of the pestilence: and what thou hast spoken is come to pass; and, behold, thou seest it.
Behold the mounts - mounds of earth, raised as breastworks by the besieging army, behind which they employed their engines, and which they gradually pushed forward to the walls of the city.
Behold, thou seest it - connected with Jeremiah 32:25. Thou seest all this with thine own eyes, and yet (what seems inconsistent with it) thou commandedst me to buy a field.