2 Samuel 13:26 Meaning

24And Absalom came to the king, and said, Behold now, thy servant hath sheepshearers; let the king, I beseech thee, and his servants go with thy servant.

25And the king said to Absalom, Nay, my son, let us not all now go, lest we be chargeable unto thee. And he pressed him: howbeit he would not go, but blessed him.

26Then said Absalom, If not, I pray thee, let my brother Amnon go with us. And the king said unto him, Why should he go with thee?

27But Absalom pressed him, that he let Amnon and all the king's sons go with him.

28Now Absalom had commanded his servants, saying, Mark ye now when Amnon's heart is merry with wine, and when I say unto you, Smite Amnon; then kill him, fear not: have not I commanded you? be courageous, and be valiant.