What did God at first reveal to man for the rule of his obedience?

Scripture proofs

• Romans 2:14-15

  (for when Gentiles who don’t have the law do by nature the things of the law, these, not having the law, are a law to themselves, in that they show the work of the law written in their hearts, their conscience testifying with them, and their thoughts among themselves accusing or else excusing them)

• Romans 5:13-14

  For until the law, sin was in the world; but sin is not charged when there is no law. Nevertheless death reigned from Adam until Moses, even over those whose sins weren’t like Adam’s disobedience, who is a foreshadowing of him who was to come.

Scripture quotations are from the World English Bible (public domain).