And G‑d said, “This is the sign of the covenant I am making between Me and you and every living creature with you, a covenant for all generations to come. I have set my rainbow in the clouds, and it will be the sign of the covenant between me and the earth. Whenever I bring clouds over the earth and the rainbow appears in the clouds, I will remember My covenant between Me and you and all living creatures of every kind. Never again will the waters become a flood to destroy all life. Whenever the rainbow appears in the clouds, I will see it and remember the everlasting covenant between G‑d and all living creatures of every kind on the earth.” (Genesis 9:12-16)
In Jewish tradition the rainbow has deeper meaning and significance than its beauty. This is reflected in the verses above in which the word “covenant” is mentioned five times. The rainbow is understood as a symbol of peace between heaven and earth, between G‑d and His world. This painting captures the colors of the rainbow’s spectrum, while at the same time there is a heavenly feeling created by the suggestion of stars and constellations. According to the Ramban (Nachmanides), the Flood represented a war that G‑d declared against man, while the rainbow represented a ceasefire and a promise. The rainbow is a sign from G‑d, painted across the sky, to testify to His promise that He will never destroy the world, a covenant of peace between G‑d and humanity.