Thébaïde, ou les Frères Ennemis" is a tragic play written by the famous French playwright Jean Racine. It was one of Racine's early works, written before he gained widespread recognition as a playwright.

The play is set in the ancient city of Thebes and revolves around the conflict between two brothers, Eteocles and Polynices, who are both vying for control of the city. The plot is deeply entwined with themes of power, ambition, and familial strife. The prophecy of the city's destruction and the intervention of the gods also play a significant role in the unfolding tragedy.

While "Thébaïde" is not as well-known as some of Racine's later tragedies, it showcases his talent for exploring complex human emotions and moral dilemmas. Racine's use of classical themes and language is evident in this early work.