Genesis 9:13-17

13I have set My rainbow in the clouds, and it will be a sign of the covenant between Me and the earth.

14Whenever I form clouds over the earth and the rainbow appears in the clouds, 15I will remember My covenant between Me and you and every living creature of every kind. Never again will the waters become a flood to destroy all life. 16And whenever the rainbow appears in the clouds, I will see it and remember the everlasting covenant between God and every living creature of every kind that is on the earth.”

17So God said to Noah, “This is the sign of the covenant that I have established between Me and every creature on the earth.”