Genesis 6:12-14, 19-20, 22

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).

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. Of fowls and birds according to their kind, of animals according to their kind, of every crawling thing of the ground according to its kind—two of every kind shall come to you to keep them alive.

So Noah did this; according to all that God commanded him, that is what he did.