In the Genesis narrative, God observes that humanity is corrupt and decides to destroy all life. However, "Noah was a righteous man, blameless in his generation, [and] Noah walked with God," and so God gives him instructions for the ark, into which he is told to bring "two of every sort [of animal]...male and female... everything on the dry land in whose nostrils was the breath of life," and their food.

While Noah was building the ark, he attempted to warn his neighbors for a century of the coming deluge, but was ignored or mocked.

Noah did everything just as God commanded him.

For forty days the flood kept coming on the earth, and as the waters increased they lifted the ark high above the earth. The waters rose and increased greatly on the earth, and the ark floated on the surface of the water. They rose greatly on the earth, and all the high mountains under the entire heavens were covered...

Now the springs of the deep and the floodgates of the heavens had been closed, and the rain had stopped falling from the sky...

Then God said to Noah and to his sons with him: “I now establish my covenant with you and with your descendants after you and with every living creature that was with you—the birds, the livestock and all the wild animals, all those that came out of the ark with you—every living creature on earth. I establish my covenant with you: Never again will all life be destroyed by the waters of a flood; never again will there be a flood to destroy the earth.”