“I am the Lord your God, who took you out of the land of Egypt, from the house of slavery” (Exodus 20:2). “I am the Lord your God” – that is what is written: “Has a people heard the voice of God [speaking [medaber] from the midst of the fire, as you heard, and lived?]” (Deuteronomy 4:33). The heretics asked Rabbi Simlai, they said to him: ‘Are there many gods in the world?’ He said to them: ‘Why?’
They said to him: ‘As, it is written: “Has a people heard the voice of God [Elohim]?”’1Elohim is a plural term. He said to them: ‘Does it say medaberim?2This is the plural term for speaking. The verse uses the singular medaber. Rather, it says medaber.’
His disciples said to him: ‘Rabbi, you rebuffed them with a smashed reed;3Your response to them was unconvincing. what do you respond to us?’ Rabbi Levi then interpreted it, he said to them: ‘“Has a people heard the voice of God” – how so? Had it been written: “The voice of the Lord is with His might,” the world would have been unable to survive. Rather, “the voice of the Lord is with might” (Psalms 29:4) – with the might of each and every individual, the lads in accordance with their might, the elders in accordance with their might, and children according to their might.
The Holy One blessed be He said to Israel: Do not believe that because you heard many voices, perhaps there are many gods in the heavens, but rather, know that I am the Lord your God, as it is stated: “I am the Lord your God”’ (Deuteronomy 5:6).