2 Samuel 13:24 (KJV)

And Tamar put ashes on her head, and rent her garment of divers colours that was on her, and laid her hand on her head, and went on crying.

And Absalom her brother said unto her, Hath Amnon thy brother been with thee? but hold now thy peace, my sister: he is thy brother; regard not this thing. So Tamar remained desolate in her brother Absalom's house.

But when king David heard of all these things, he was very wroth.

And Absalom spake unto his brother Amnon neither good nor bad: for Absalom hated Amnon, because he had forced his sister Tamar.

And it came to pass after two full years, that Absalom had sheepshearers in Baalhazor, which is beside Ephraim: and Absalom invited all the king's sons.

And 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.

Then 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?

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

Now 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.

And the servants of Absalom did unto Amnon as Absalom had commanded. Then all the king's sons arose, and every man gat him up upon his mule, and fled.