The Talmud tells us that: "Seven prophets prophesied to the nations of the world, namely, Balaam and his father, Job and his four friends." (Bava Batra 15b)
What did they prophesy? We only know what Balaam prophesied from the Torah. What about the other six?
The Torah tells us that Miriam was a "prophetess", but we had to wait for extra biblical sources to tell us what she prophesied. Do such sources exist for the six in question?