Jewish Mysticism
The secret of the corona (‘atarah) is the rainbow (qeshet)… and this is the secret of the unity itself, that is, the secret of the commandment (miswah) in the secret of the conjunction of the male… and this is verily the waw, the secret of the rainbow, which comprises all the gradations in a single unity, in the secret of the yod, as we mentioned. … Thus, we have already said that since the aspect of the rainbow at one time was disclosed, it will never again be removed from the world, but it may be hidden by covers that darken ….. When it is covered, then is the exile, but when it is removed from these coverings, then shall be the redemption, in the secret, “I will see it and remember the everlasting covenant” (Gen. 9-16).
Translated by Elliot Wolfson in “Tiqqun ha-Shekhinah- Redemption and the Overcoming of Gender Dimorphism in the Messianic Kabbalah of Moses Hayyim Luzzatto,” History of Religions 36 (1997) 289-332.