In the biblical Noah’s Ark story, God placed a rainbow in the clouds as the sign of the covenant.
Genesis 9 describes the covenant made after the Flood between God, Noah, his descendants, and every living creature. The rainbow is presented as a visible reminder of that promise. God says that when the bow appears in the clouds, the covenant will be remembered and the waters will not again become a flood destroying all flesh.
The passage uses the image of a bow, commonly translated as rainbow in English Bibles. It connects a natural sky phenomenon with a theological promise in the narrative. The covenant is not limited only to Noah’s family; the text explicitly includes living creatures.
This question is distinct from asking what happened after the ark landed: the rainbow is the covenant sign established after the Flood. Later cultures also use rainbows as symbols of hope or peace, but Genesis gives this specific covenant meaning.