Albert Barnes Commentary Jeremiah 37:12

"then Jeremiah went forth out of Jerusalem to go into the land of Benjamin, to receive his portion there, in the midst of the people." — Jeremiah 37:12 (ASV)

To separate himself from there ... - To receive a share from there. When the siege was temporarily raised, the first object would be food, and, accordingly, Jeremiah accompanied by others, who, like himself, had a right to share in the produce of the priests’ lands at Anathoth, started there to see whether any stores remained which might be available for their common use.