In Genesis, God set a rainbow in the sky as the sign of the covenant after the story of Noah’s Ark.
Genesis 9 presents the rainbow as a covenant sign between God, Noah, and every living creature after the Flood. The covenant promises that waters will not again become a flood destroying all life on earth. The rainbow therefore has a theological meaning in the narrative, not merely an atmospheric one.
The passage describes the sign as appearing in the clouds. It connects the visible phenomenon with a promise remembered by God and recognized by humanity. Genesis extends the covenant beyond Noah’s family to animals and the earth itself.
The rainbow is not introduced as a weapon, a route, or a signal used during the voyage. It appears after Noah leaves the ark and builds an altar. Modern scientific explanations describe rainbows through refraction, reflection, and dispersion of light in water droplets, while the biblical passage focuses on covenant symbolism.