1 Kings 1:41

Alarm and submission of Adonijah (Not in Chronicles)

41. as they had made an end of eating Such a banquet would naturally last a good while; and if we suppose Nathan to have heard of it as the festivity began, or he even may have known as they left Jerusalem, there will be seen to be time enough for all that is described as done by the supporters of Solomon. For they had no banquet to prepare and eat, but only the religious ceremonial to discharge which marked their master's chosen son for king.

Joab heard Any preparation against opposition to their action would properly be left to the commander-in-chief, and so he is alert to mark any signs of a commotion. Josephus represents the interruption as coming before the meal was finished.