Genesis 6:12-15, 19-20, 22

for he saw how debased the world had become, for everyone was corrupt to the core. So God said to Noah, “I have decided that all living creatures must die, for their violence has filled the earth, and I will wipe them off the face of the earth! Build a boat for yourself—an ark of sturdy timber. And this is how you are to design it: make separate compartments within it, and seal it inside and out with thick tar. The length is to be 450 feet, its width 75 feet, and its height 45 feet.

Bring with you into the ark a pair of every animal, male and female; and they will also be spared. Different kinds of birds, animals large and small —two of every kind I will send to you to be kept alive.

So Noah completed all these preparations and did everything exactly as God had commanded him.