page 374 : Iliad, XI.26

Three bright cerulean serpents on each side
Rose to the gorget; they like rainbows seem’d,
Which Jove, Saturnian king, has plac’d on high
In wat’ry clouds, a sign to mortal men.

This passage in Homer is very remarkable
showing that he had either seen the Mosaic history, or was informed by tradition,
that the rainbow was placed in the cloud,
to be the sign of a covenant between God and man,
as related in Genesis.