The Education of Achilles

Publilius Statius - Achilleid Book I
Achilles sings to Thetis:

Gladly he sings of the mighty causes of noble deeds: how many behests of his haughty stepmother the son of Amphitryon performed, how Pollux with his glove smote down the cruel Bebryx, with what a grip the son of Aegeus enfolded and crushed the limbs of the Minoan bull, lastly his own mother's marriage-feast and Pelion trodden by the gods.

Then Thetis relaxed her anxious countenance and smiled. Night draws them on to slumber; the huge centaur lays him down on a stony couch, and Achilles lovingly twines his arms about his shoulders - though his faithful parent is there - and prefers the wonted breast.