Ibn Abbas said, "The Milky Way is one of the gates of the heavens.
The rainbow is security from being destroyed by flood after the people
of Nuh, peace be upon him."
Ibn 'Abbas said, "The rainbow is security for the people of the
earth that they will not be drowned. The Milky Way is the door of the heavens
and forms a furrow through it."
Ibn 'Abbas said, "None of you should say about a thing which he
does not know, 'Allah knows it' when Allah may know that it is other than
what he said and thus he (tries to) teach Allah what he does not know.
That is something terrible in Allah's sight."
