The Poem Af Jörðu Ertu Kominn written by rafnar appears in the song Af Jörðu Ertu Kominn by Framfari and is performed by Katla Marín Þorkelssdóttir and Vilborg Dagbjartsdóttir in two separated versions for the film Cosmic Birth.
Here you can read both Icelandic and English translation of the poem.