The very first time in the Bible that the verb ''tsavah '' (צָוָה, “to command”) appears is in the verse "And the L-rd G-d commanded the man saying, of every tree of the garden you may freely eat" (Genesis 2:16). Rabbinic tradition understands this first commandment to ''Adam HaRishon'' as including the entire Noahide Law:
# ''And [He] commanded'', refers to '''legal system''', and thus it is written, For I know him, that he will command his children and his household after him, and they shall keep the way of the Lord, to do justice and judgment.
# ''The L-rd'' — is [a prohibition against] '''blasphemy''', and thus it is written, and he that blasphemeth the name of the Lord, he shall surely be put to death.