The Iliad by Homer Book 7 Page 14

Hector beat quickly, but he could not now retreat and withdraw into the ranks behind him, for he had been the challenger. Ajax came up bearing his shield in front of him like a wall — a shield of bronze with seven folds of oxhide — the work of Tychius, who lived in Hyle and was by far the best worker in leather.

He had made it with the hides of seven full-fed bulls, and over these he had set an eighth layer of bronze. Holding this shield before him, Ajax son of Telamon came close up to Hector, and menaced him saying, “Hector, you shall now learn, man to man, what kind of champions the Danaans have among them even besides lion-hearted Achilles cleaver of the ranks of men. He now abides at the ships in anger with Agamemnon shepherd of his people, but there are many of us who are well able to face you; therefore begin the fight.”