Charles Spurgeon Commentary Genesis 7:5

"And Noah did according unto all that Jehovah commanded him." — Genesis 7:5 (ASV)

Here was positive proof of his righteousness, because he was obedient to the word of the Lord. A man who does not obey God's commands may talk about righteousness, even the righteousness which is of faith, but it is clear that he does not possess it. For faith works by love, and the righteousness which is by faith is proved by obedience to God. Noah did according unto all that the Lord commanded him, and so proved that he was righteous before God.