Genesis 9:12-17

Then God said, “I am giving you a sign of my covenant with you and with all living creatures, for all generations to come.  I have placed my rainbow in the clouds. It is the sign of my covenant with you and with all the earth.  When I send clouds over the earth, the rainbow will appear in the clouds,  and I will remember my covenant with you and with all living creatures. Never again will the floodwaters destroy all life.  When I see the rainbow in the clouds, I will remember the eternal covenant between God and every living creature on earth.” Then God said to Noah, “Yes, this rainbow is the sign of the covenant I am confirming with all the creatures on earth.”