Charles Ellicott Commentary 2 Samuel 13:9

"And she took the pan, and poured them out before him; but he refused to eat. And Amnon said, Have out all men from me. And they went out every man from him." — 2 Samuel 13:9 (ASV)

He refused to eat. —This also seemed natural enough in a whimsical invalid, and for the same reason his next requirement, Have out all men from me, awakened no suspicion in the mind of Tamar.