Final Answer:
Jason repaid Medea for her help by abandoning her and marrying another woman, Glauce, the daughter of King Creon of Corinth.
Step-by-step explanation:
Jason's actions towards Medea as a form of "repayment" were deeply treacherous. Medea, a powerful sorceress and princess of Colchis, had assisted Jason in obtaining the Golden Fleece, even going to the extent of betraying her family and committing murder for him. However, after their escape and the challenges they faced together, Jason abandoned Medea to marry Glauce, seeking political advantage through this new union. This betrayal inflicted immense emotional and psychological harm on Medea, leading her to enact a series of revengeful actions that became the focus of Euripides' tragedy "Medea."
The abandonment of Medea by Jason is a pivotal moment in the mythological narrative, showcasing the consequences of betrayal and the complexities of relationships. Jason's actions not only violated the trust and loyalty Medea had invested in him but also led to a tragic chain of events, including the murder of Glauce and her own children by Medea. The portrayal of Jason's betrayal serves as a cautionary tale about the destructive potential of ungratefulness and the devastating impact of broken promises and shattered trust within interpersonal relationships.