The verses in question do not specifically say that Noah kept the Sabbath, much like the scriptures do not specifically say that Adam, Abraham, or Issac kept the Sabbath. But when we study the law and realize that the definition of sin is breaking the law (1 John 3:4), and that all the law must exist together, other wise, like a chain, its useless (James 2:10-11), then you will quickly note that if Noah broke the Sabbath… he sinned.
Paul tells us that if theres no law, there is no sin (Romans 4:15). Likewise therefore, when there is sin, there must be a law implimented to convince the violator that they performed a wicked deed. When Joseph told Potifer’s wife for example…
“… how then can I do this great wickedness, and sin (transgress the law -1 John 3:4) against God?” -Genesis 39:9
… he obviously knew that a law existed which forbade adultery, and coveting.
The bible does not specifically say that Adam kept the Sabbath, but Jesus said that the Sabbath was made for man (Mark 2:27). When was man, and when was the Sabbath, made? In Genesis chapters 1 and 2. Who then was it made for? For Adam and his descendents. If then the Sabbath, along with the rest of the law, existed since the time of Adam… it becomes obvious that Noah, a descendent of Adam, was aware of it.
Heres another clue.
Peter said that Noah was “a preacher of righteousness” (2 Peter 2:5). But… what is righteousness?
My tongue shall speak of thy word: for all thy commandments are righteousness.
Righteousness is the “commandments,” which includes, of course, the Sabbah (Exodus 20:8-11). Therefore if Noah preached it, you better believe he lived it as well!
For further study, see: