Where did the hellfire doctrine come from?

In ancient Babylonian and yrian beliefs the “nether world . . . is pictured as a place full of horrors, and is presided over by gods and demons of great strength and fierceness.” (The Religion of Babylonia and yria, Boston, 1898, Morris Jastrow, Jr., p. 581) Early evidence of the fiery aspect of Christendom’s hell is found in the religion of ancient Egypt. (The Book of the Dead, New Hyde Park, N.Y., 1960, with introduction by E. A. Wallis Budge, pp. 144, 149, 151, 153, 161) Buddhism, which dates back to the 6th century B.C.E., in time came to feature both hot and cold hells. (The Encyclopedia Americana, 1977, Vol. 14, p. 68) Depictions of hell portrayed in Catholic churches in Italy have been traced to Etruscan roots.—La civiltà etrusca (Milan, 1979), Werner Keller, p. 389.