Albert Barnes Commentary Jeremiah 32:25

"And thou hast said unto me, O Lord Jehovah, Buy thee the field for money, and call witnesses; whereas the city is given into the hand of the Chaldeans." — Jeremiah 32:25 (ASV)

For - See the margin. It is enough to place the command side by side with the state of Jerusalem to show how contrary it is to all the rules of human prudence. The prophet is sure that God will explain to him his difficulty.