Glande sues laeti redeunt: the pigs come home regaled with acorns … in Virgil’s rural paradise, even the livestock live off the fat of the land. The swineherd knocking down mast from the trees for his animals is from a famous late-mediaeval Book of Hours, the Très Riches Heures du Duc de Berry.
Hear Virgil’s Latin and follow in John Dryden’s charming but not very faithful 17th century translation here.