The Odyssey 24.496–505

But when they had clothed their bodies in gleaming bronze, they opened the doors and went forth, and Odysseus led them. Then Athena, daughter of Zeus, drew near them in the likeness of Mentor both in form and in voice, and the much-enduring, goodly Odysseus was glad at sight of her, and straightway spoke to Telemachus, his dear son: “Telemachus, now shalt thou learn this—having thyself come to the place of battle, where the best warriors are put to the trial—to bring no disgrace upon the house of thy fathers, for we have ever excelled in strength and in valor over all the earth.”