The first commandment forbiddeth the denying,1 or not worshipping and glorifying the true God as God,2 and our God;3 and the giving of that worship and glory to any other, which is due to him alone.4
1 To the chief Musician, A Psalm of David. The fool hath said in his heart, There is no God. They are corrupt, they have done abominable works, there is none that doeth good.
2)
Romans 1:21
21 Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.
3)
Psalm 81:10-11
10 I am the LORD thy God, which brought thee out of the land of Egypt: open thy mouth wide, and I will fill it.
11 But my people would not hearken to my voice; and Israel would none of me.
4)
Romans 1:25-26
25 Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator, who is blessed for ever. Amen.
26 For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature: