Question:
In Hil. Teshuvah 3:7 of the Mishneh Torah (in his listing of heretics - minim), the Rambam makes the following statement:
והאומר שיש שם מנהיג אבל הן שנים או יותר
"The one who says there is indeed a [God] directing [the universe], but that there are two or more."
What is the basis of this ruling?
And where is it stated in earlier sources (pre-Rishonim) that only God has control over everything?
Answer:
Please see sources below.
Sources:
See Devorim 4:35 &39
