Absalom went to the king and said, "Your servant has had shearers come. Will the king and his officials please join me?"
"No, my son," the king replied. "All of us should not go; we would only be a burden to you." Although Absalom urged him, he still refused to go, but gave him his blessing.
Then Absalom said, "If not, please let my brother Amnon come with us." The king asked him, "Why should he go with you?"
But Absalom urged him, so he sent with him Amnon and the rest of the king's sons.
Absalom1 ordered his men, "Listen! When Amnon is in high2 spirits from drinking wine and I say to you, 'Strike Amnon down,' then kill him. Don't be afraid. Have not I given you this order? Be strong and brave.3"
References for 2 Samuel 13:28
So Absalom's men did to Amnon what Absalom had ordered. Then all the king's sons got up, mounted their mules and fled.
While they were on their way, the report came to David: "Absalom has struck down all the king's sons; not one of them is left."