Matthew Poole and continuators on Jeremiah 38:20

20 But Jeremiah said, They shall not deliver thee : Obey, I beseech thee, the voice of the LORD, which I speak unto thee: so it shall be well unto thee, and thy soul shall live.

The Chaldeans shall not do so base an act, but deal with thee as with a Prince.

Let not this therefore be a temptation to thee, to disobey the command of God, which if thou doest thou shalt live, though not in that splendor in which thou now livest, yet in a much more comfortable state, then thou wilt do if they take the City by storming.