What does 1 Samuel 15:16 mean?
Samuel has heard enough of Saul's lame series of excuses, deflections, and blaming others. The Israelite king disobeyed God by refusing to fully cooperate with all the Lord's commands (1 Samuel 15:3, 9). One can imagine the prophet responding much as a modern reader would: shaking their head, lifting a hand, and saying, "Stop!" Samuel recognizes that Saul is only increasing his guilt by failing to acknowledge what he has done.Samuel reveals that the Lord has already been talking to Samuel about Saul's disobedience. Saul's excuses and rearrangement of the facts are worthless. Samuel has heard the truth directly from the Lord (1 Samuel 15:10). Now he will tell Saul about God's response for this disobedience.
As king, Saul held the supreme authority over Israel, but he does not argue with Samuel's command to stop speaking. He tells the prophet to say what he has come to say.