Tie himself down, she says he doesn't have to, but if he wants to hear them he should have his men tie him down.
Circe warns Odysseus about the Sirens, Charybdis, and Skylla.
Circe
Circe told him about the Siren and Scylla and Chrybdis
The Sirens, Scylla and Charybdis.
Book 12 of the Odyssey.
So that Circe could tell them the warnings of the sea, thus dodging the Sirens.
He told them to put wax in their ears, so they wouldnt hear the sirens.
Circe is a goddess.
Eleanor describes how Odysseus climbed on Circe's roof to watch the plunders. While on the roof, Odysseus heard the voice of the Sirens in the distance, which tempted him with the promise of knowledge and experience.
Circe advises Odysseus to block his crew's ears with beeswax to prevent them from hearing the Sirens' enchanting song. Additionally, she instructs him to have himself tied to the ship's mast, ensuring that he can hear the Sirens' call without succumbing to it. This way, he can safely navigate past the Sirens while protecting his crew from their deadly lure.
To put wax in the sailors ears and tie themselves to the ship.
Circe warns Odysseus that the Sirens will enchant his men with their beautiful singing, luring them to their doom. She explains that the Sirens' song will tempt the sailors to abandon their ship and swim toward the source of the music, ultimately leading them to be shipwrecked and devoured. To protect his crew, she advises Odysseus to plug their ears with beeswax and to have himself tied to the mast of the ship so he can safely hear the Sirens without succumbing to their lure.