**On the first** of the second month the waters dried up, and on the 27th of the second month the earth was dry and he went out from the ark. [From the plain meaning of the verses it is proven that the years and months in the early generations were equal in measure to the years and months that we use today. For in year 600 of Noah's life the fountains burst forth, and in the 12th month the tops of the mountains appeared, and after 40 days he opened the window of the ark, and he waited seven days and another seven days.
And after all this it says "and it was in the six hundred and first year"—behold, all these months and days did not count toward Noah's years except as one year, even counting the early months as our months. Because from the 17th of the seventh month mentioned in the passage, 150 days are counted, as it says "at the end of 150 days"—behold, this brings each month to 30 days. And this contradicts the opinion that year 130 is mentioned in the first millennium (Tzemach David)].
And they went out, each to his way and to his place, and Noah and his sons dwelt in the land of which the Lord had spoken to them, and they served the Lord, and the Lord blessed them to be fruitful and multiply [(Sefer HaYashar)]. Our Sages said: When Noah went out from the ark, a lion struck him and he was injured and could not offer sacrifices, so his son Shem offered in his place [(Seder HaDorot)].
The Tashbetz wrote that there were harmful creatures in the ark, and they harmed Noah's sons. And one angel took one of his sons to the Garden of Eden and taught him the Book of Remedies, and this is the book that Hezekiah hid [(Be'er Avraham, at the end of the Passover section)]: