First apparence of the trojan horse

What is the First work of literature to mention the famous Trojan Horse? I haven’t read Vigil or Homer, but I’ve heard that the Trojan Horse gets mentioned in the Aneiad, but that was written nearly 1000 years after Homer.

It is mentioned by Homer in the Odyssey, viii 493.

link to Perseus Project
Robert Graves mentiones scores of other references.