Albert Barnes Commentary 1 Kings 20:8

"And all the elders and all the people said unto him, Hearken thou not, neither consent." — 1 Kings 20:8 (ASV)

“The people” had no distinct place in the ordinary Jewish or Israelite constitution, but they were accustomed to signify their approval or disapproval of the elders’ decisions by acclamations or complaints (Joshua 9:18; Judges 11:11, and elsewhere).