Genesis 6:19

“And of every living thing of all flesh, two of every sort shalt thou bring into the ark, etc.] That is, of fowls, cattle, and creeping things, as after explained; and two of each sort at least were to be brought, as Jarchi observes, and not fewer; though of the clean sort there were to be more, even seven, as after directed; and these were to be brought, that they might preserve their species, as it follows: to keep [them] alive with thee; to be fed and nourished by him in the ark, while others perished by the flood, that so they might propagate their own species, and be continued, for which reason it is further ordered: they shall be male and female; not any two, but one male and one…”

“- Section VI - The Deluge - XXIII. The Ark 9. דור dôr “age, time from birth to death,” applied either to an individual or the whole contemporary race, running parallel with some leading individual. Hence, the “race” or “generation” living during that time. 14. תבה tēbâh “chest, ark.” It is used only of this vessel of Noah’s construction, and of the little vessel in which Moses was put Exodus 2:3, Exodus 2:5. The root, according to Furst, means “to be hollow.” אבה 'ēbeh a cognate word, signifies “a reed;” κιβωτός kibōtos Septuagint. גפר goper α. λ., perhaps “fir, cypress, resinous wood.” קן qēn “nest, room; related: prepare, rear up.” 16. צהר tsohar “shining, light;” not the same as…”

“6:19-20 God’s instructions to Noah repeat the language of creation (every kind, cp. 1:24). • a male and a female: These animals would procreate and repopulate the earth after the flood.”

“The cubit being nearly 22 inches, and the ark being 300 cubits in length, 50 in breadth, and 30 in height (Gen 6:15), its size was equal to 547 feet long, 91 feet broad, and 54 feet high; and it is computed to had been 81,062 tons burthen. These dimensions were sufficient to contain all the persons and animals in it, and food for more than a year. two: Gen 7:2, Gen 7:3, Gen 7:8, Gen 7:9, Gen 7:15, Gen 7:16, Gen 8:17; Psa 36:6 Genesis 6:20”