And not only did Israel alone break out in song. But all the peoples — When they heard that Pharaoh and his hosts had been lost in the sea and their rule had been abolished, and their idolatry had been castigated — all of them rejected their idolatry and opened their mouths and said "Who is like you among the mighty, etc."
Not Only Did Israel Alone Break Out in Song
Mekhilta Tractate Shirah 8:2