Chapter (74) 75: Writings [1] For the conductor, a psalm of Asaph [a song known in Judah], God is great in Israel, His name is exalted (Psalms 76:1-2). The scriptures says: You have been shown [to know that the Hashem, He is God; there is none beside Him]. (Deuteronomy 4:35). Moses said to them, "Before God chose you (whose name became known to you, you were shown [the truth], and so on), no person in the world knew that He is God of the world, as it is said, 'Pour out Your wrath on the nations that do not know You' (Jeremiah 10:25)."
"From the moment that God chose you, His name became known to you, you were shown [the truth], and so on. Similarly, you can see this with Pharaoh, to whom Moses said, 'Thus says the Lord, the God of Israel,' and Pharaoh responded, 'Who is the Lord?' (Exodus 5:2). God said to him, 'You claim not to know Me?' (Exodus 5:3). When the Israelites reached the Red Sea, they were afraid to go down into it.
At that moment, the tribe of Judah stepped forward and descended into the sea, as it says, 'Judah became God's sanctuary' (Psalms 114:2). From that moment on, God's name became known throughout the world, as it says, 'For the earth shall be full of the knowledge of the Lord, as the waters cover the sea' (Isaiah 11:9). When the sea covered the Egyptians, who made His name known to you? It was through Judah, as it says, 'In Judah God is known, His name is great in Israel' (Psalms 76:2)."