Exodus 20:3-6
You shall have no other gods beside Me. You shall not make for yourself any graven image, nor any manner of likeness, of any thing that is heaven above, or that is in the earth beneath, or that is in the water under the earth. You shall not bow down to them, nor serve them, for I, the Lord Your God, am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation.
The Hebrew scripture (Tanakh) does not support any other divine being that exists with YHWH.
Here are a handful of verses to support that there are no other gods beside YHWH.
Isaiah 43:10
10 “You are my witnesses,” says YHWH,
“and my servant whom I have chosen,
so that you can know and trust me
and understand that I am he —
no god was produced before me,
nor will any be after me.
In Isaiah 44:24, YHWH our God makes it clear that he created all things (both in the heavens and on the earth) alone by Himself.
Isaiah 44:24
24 Here is what YHWH says, your Redeemer,
he who formed you in the womb:
“I am YHWH, who makes all things,
who stretched out the heavens all alone,
who spread out the earth all by myself.
If we read through the Tanakh, it has been repeated again and again that YHWH is the only God; and besides Him, there is no other god.
Here is a very informative video on the oneness of God from Felipe, a Karaite Jew who has been instrumental in my Karaite journey.