This beautiful music is from the end of Act 2 of the opera Hansel and Gretel by German composer Engelbert Humperdinck (1854-1921). The duet is a prayer by the brother and sister as they seek the protection of angels before falling asleep on the forest floor. The opera, Humperdinck's most famous composition, is based on the fairy tale by the Grimm brothers, and has libretto by the composer's sister. It was first performed in December, 1893.
