John Gill Commentary Jeremiah 42:8

"Then called he Johanan the son of Kareah, and all the captains of the forces that were with him, and all the people from the least even to the greatest," — Jeremiah 42:8 (ASV)

Then called he Johanan the son of Kareah That is, Jeremiah, as soon as he had received the answer from the Lord, called to Johanan; who, after the death of Gedaliah, was a person of the greatest authority, and had the command of the people, to come to him, and hear what it was:

he either called to him vocally and by name; or he sent a proper messenger to him, to meet him at some convenient place, to receive it;

and not him only, but all the captains of the forces which [were] with him, and all the people, from the least even to the greatest ;

they were all convened together, as it was proper they should, to hear the word of the Lord; and the rather, since they all joined in a request to the prophet, (Jeremiah 42:1) .