Author: Coelius Sedulius
Year: 450
This is the first line of Sedulius's 5th-century Latin hymn "Hostis Herodes impie" (from his poem Paean alphabeticus de Christo). English translations vary; this version closely matches traditional renderings such as those by John Mason Neale or in various breviaries. Alternate attributions usually refer only to the translator, not the original author.