Similarly, (Devarim 6:4) "Hear, O Israel, the L–rd our G–d, the L–rd is One." Is it not already written "the L–rd our G–d." Why, then, "the L–rd is One"? It is with us that He especially unifies His name. nding which I have unified My name only with My people, Israel.
Hear, O Israel, the Lord Our God
Mekhilta Tractate Kaspa 4:15