From what I have seen in reading Tanach every conversation is between two parties and two parties only. Sometimes those parties consist of 1 person and other times of several people for example "And his brothers said..." but in all of those latter instances the group of people are speaking as one unified voice.
Even when there are multiple people present the conversations seem to be recorded as a two party conversation. For example with Iyov there is never a time where all of his friends speak together in a single conversation taking turns - ie you don't have Iyov says X, Bildad responds with Y then Eliphaz interjects Z. Instead you have each person sequentially delivering a soliloquy.
I would like to know if there are any examples of dialogue in Tanach where all 3 or more parties are actively engaged in a conversation together at the same time.