Again the bible does not say. The first words recorded of God speaking to others is:“And God said, ‘Let us make man in our image, and in our likeness and let them rule over the fish of the sea and the birds of the air.’” (Genesis Chapter 1 verse 26a)
A study book I have says ‘God was speaking to the heavenly court.’ I can only guess that was the Archangels Gabriel and Michael, many angels and maybe even Satan too. We cannot be sure.