Rorate coeli (or Rorate Caeli), from the Book of Isaiah (Isaiah 45:8) in the Vulgate, are the opening words of a text used in Catholic and, less frequently, Protestant liturgy. It is also known as The Advent Prose or by the first words of its English translation, "Drop down ye heavens from above."
It is used frequently sung as a plainsong at Mass and in the Divine Office during Advent. where it gives expression to the longings of Patriarchs and Prophets, and symbolically of the Church, for the coming of the Messiah. Throughout Advent it occurs daily as the versicle and response after the hymn at Vespers.
℣ Rorate coeli desuper et nubes pluant justum(Drop down dew, ye heavens, from above, and let the clouds rain the just)
℟ Aperiatur terra et germinet salvatorem"
(Let the earth be opened and send forth a Saviour"). —30px
Read more about Rorate Coeli: Other Uses, Text