When Odysseus was walking with Eumaeus to his home in a disguise as a beggar he noticed a old hound, the dog lifted his head..."Argos" Odysseus said. Eumaeus replied(not knowing Odysseus is who he is talking to) " A hunter owned him but the man is dead/ in some far place. If this old hound could show/ the form he had when lord Odysseus left him,going to Troy,you'd see him swift and strong/...he goes on about how the dog was treated (17.695)
Argos was using all its strength left and waged his tail and tried to hold up his head... and greet his master.
Eumaeus crossed the court and went straight forward/ into the magaron among the suitors; but death and darkness in that instant closed/ the eyes of Argos, who had seen his master,/ Odysseus, after twenty years.... (17.795)