Unity of God: Asserted by Apostles
Source: TTT
1 Corinthians 8:4, 6
So about eating food sacrificed to idols: We know that an idol is nothing at all in the world, and that there is no God but one. / yet for us there is but one God, the Father, from whom all things came and for whom we exist. And there is but one Lord, Jesus Christ, through whom all things came and through whom we exist.
Ephesians 4:6
one God and Father of all, who is over all and through all and in all.
1 Timothy 2:5
For there is one God, and there is one mediator between God and men, the man Christ Jesus,