"" (A boy is born for us) is a Gregorian chant, the introit for Christmas Day. Thomas Tallis wrote a Christmas mass on the chant. Text The text of the antiphon is taken from Isaiah 9:6, while the psalm verse is verse 1 from Psalm 98, "Sing a new song to the Lord". Musical settings The melody was used by composers in contrafacta such as the Christmas mass by Thomas Tallis. References External links Puer natus est nobis hymnarium.de Puer natus est nobis kathpedia.com Puer natus est nobis toddtarantino.com Christmas music Christian chants Latin-language Christian hymns Latin religious words and phrases