Let Scripture speak for itself before I reply:
Exodus 20:3 Thou shalt have no other gods before me. 4 Thou shalt not make unto thee any graven image, or any likeness of any thing that is in heaven above, or that is in the earth beneath, or that is in the water under the earth: 5 Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me; 6 And shewing mercy unto thousands of them that love me, and keep my commandments
Exodus 34:14 For thou shalt worship no other god: for the LORD, whose name is Jealous, is a jealous God
Daniel 3:29 Therefore I make a decree, That every people, nation, and language, which speak any thing amiss against the God of Shadrach, Meshach, and Abednego, shall be cut in pieces, and their houses shall be made a dunghill: because there is no other God that can deliver after this sort
Genesis 35: 11 And God said unto him, I am God Almighty: be fruitful and multiply; a nation and a company of nations shall be of thee, and kings shall come out of thy loins; 12 And the land which I gave Abraham and Isaac, to thee I will give it, and to thy seed after thee will I give the land
Psalm 46:10 Be still, and know that I am God: I will be exalted among the heathen, I will be exalted in the earth
Psalm 50:7 Hear, O my people, and I will speak; O Israel, and I will testify against thee: I am God, even thy God
Isaiah 43:12 I have declared, and have saved, and I have shewed, when there was no strange god among you: therefore ye are my witnesses, saith the LORD, that I am God
Isaiah 45:22 Look unto me, and be ye saved, all the ends of the earth: for I am God, and there is none else
Isaiah 46:99 Remember the former things of old: for I am God, and there is none else; I am God, and there is none like me, Twice in one verse