Genesis 6:1, 3-8, 12-14, 17-19

Now it happened, when men began to multiply on the face of the land, and daughters were born to them

Then the LORD said, “My Spirit shall not strive and remain with man forever, because he is indeed flesh [sinful, corrupt—given over to sensual appetites]; nevertheless his days shall yet be a hundred and twenty years.” There were Nephilim (men of stature, notorious men) on the earth in those days—and also afterward—when the sons of God lived with the daughters of men, and they gave birth to their children. These were the mighty men who were of old, men of renown (great reputation, fame). [Num 13:33] The LORD saw that the wickedness (depravity) of man was great on the earth, and that every imagination or intent of the thoughts of his heart were only evil continually. The LORD regretted that He had made mankind on the earth, and He was [deeply] grieved in His heart. So the LORD said, “I will destroy (annihilate) mankind whom I have created from the surface of the earth—not only man, but the animals and the crawling things and the birds of the air—because it [deeply] grieves Me [to see mankind’s sin] and I regret that I have made them.” But Noah found favor and grace in the eyes of the LORD.

God looked on the earth and saw how debased and degenerate it was, for all humanity had corrupted their way on the earth and lost their true direction. God said to Noah, “I intend to make an end of all that lives, for through men the land is filled with violence; and behold, I am about to destroy them together with the land. Make yourself an ark of gopher wood; make in it rooms (stalls, pens, coops, nests, cages, compartments) and coat it inside and out with pitch (bitumen).

For behold, I, even I, will bring a flood of waters on the earth, to destroy all life under the heavens in which there is the breath and spirit of life; everything that is on the land shall die. But I will establish My covenant (solemn promise, formal agreement) with you; and you shall come into the ark—you and your [three] sons and your wife, and your sons’ wives with you. And of every living thing [found on land], you shall bring two of every kind into the ark, to keep them alive with you; they shall be male and female.