Albert Barnes Commentary Jeremiah 38:23

"And they shall bring out all thy wives and thy children to the Chaldeans; and thou shalt not escape out of their hand, but shalt be taken by the hand of the king of Babylon: and thou shalt cause this city to be burned with fire." — Jeremiah 38:23 (ASV)

So - And. In addition to the ridicule, there will be the miseries of the capture.

Thou shalt cause this city to be burned - literally, as margin. It will be your own act as completely as if done with your own hand.