Ecclesiastes 12:13 in the World English Bible
This is the end of the matter. All has been heard. Fear God and keep his commandments; for this is the whole duty of man.
Context
12 And further, by these, my son, be admonished: of making many books there is no end; and much study is a weariness of the flesh.
13 Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man.
14 For God shall bring every work into judgment, with every secret thing, whether it be good, or whether it be evil.