Birth of Song

Miyom sheboro hakadosh baruch hu et olamo ("From the time that God created the world,") v'ad she-amdi Yirsal al hayam ("until that every day when the Israelites stood at the banks of the Red Sea,") "lo motzuinu she'amru shirah ("we do not find anyone singing before God.") -Exodus Rabbah 23:4

Song was born when freedom was won.