It was shown to you so that you might know that Yahweh is God. There is no one else besides him.
TSK
TSK · Deuteronomy 6:4
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"I am Yahweh your God, who brought you out of the land of Egypt, out of the house of bondage.
So the servants of king Hezekiah came to Isaiah.
For you are great, and do wondrous things. You are God alone.
This is what Yahweh, the King of Israel, and his Redeemer, Yahweh of Armies, says: "I am the first, and I am the last; and besides me there is no God.
I am Yahweh, and there is none else. Besides me, there is no God. I will strengthen you, though you have not known me;
Yahweh will be King over all the earth. In that day Yahweh will be one, and his name one.
I and the Father are one."
Therefore concerning the eating of things sacrificed to idols, we know that no idol is anything in the world, and that there is no other God but one.