After Odysseus and Telemachus routed the suitors that had been threatening his wife, Penelope, some of the suitors' surviving relatives confronted them. Athena infused vigor into Laertes, so he could help Odysseus by killing Eupeithes, father of Antinous.
Homer, Odyssey XXIV; Ovid, Metamorphoses VIII, 315.
Laertes is also a character in William Shakespeare's play, Hamlet.