Genesis 7:10
5 And Noah did according unto all that the LORD commanded him. 6 And Noah was six hundred years old when the flood of waters was upon the earth. 7 And Noah went in, and his sons, and his wife, and his sons' wives with him, into the ark, because of the waters of the flood. 8 Of clean beasts, and of beasts that are not clean, and of fowls, and of every thing that creepeth upon the earth, 9 There went in two and two unto Noah into the ark, the male and the female, as God had commanded Noah. 10 And it came to pass after seven days, that the waters of the flood were upon the earth.
Here is Noah's ready obedience to the commands that God gave him. Observe, 1. He went into the ark, upon notice that the flood would come after seven days, though probably as yet there appeared no visible sign of its approach, no cloud arising that threatened it, nothing done towards it, but all continued serene and clear; for, as he prepared the ark by faith in the warning given that the flood would come, so he went into it by faith in this warning that it would come quickly, though he did not see that the second causes had yet begun to work. In every step he took, he walked by faith, and not by sense. During these seven days, it is likely, he was settling himself and his family in the ark, and distributing the creatures into their several apartments. This was the conclusion of that visible sermon which he had long been preaching to his careless neighbours, and which, one would think, might have awakened them; but, not obtaining that desired end, it left their blood upon their own heads. 2. He took all his family along with him, his wife, to be his companion and comfort (though it should seem that, after this, he had no children by her), his sons, and his sons' wives, that by them not only his family, but the world of mankind, might be built up. Observe, Though men were to be reduced to so small a number, and it would be very desirable to have the world speedily repeopled, yet Noah's sons were each of them to have but one wife, which strengthens the argument against having many wives; for from the beginning of this new world it was not so: as, at first, God made, so now he kept alive, but one woman for one man. See Matt. xix. 4, 8. 3. The brute creatures readily went in with him. The same hand that at first brought them to Adam to be named now brought them to Noah to be preserved. The ox now knew his owner, and the ass his protector's crib, nay, even the wildest creatures flocked to it; but man had become more brutish than the brutes themselves, and did not know, did not consider, Isa. i. 3.