Now that the daylight fills the sky, WAB 18b "In S. Angelum custodem (In the custody of the holy angels)"

Bruckner composed this motet in the summer of 1868 for the Schutzengelbruderschaft ("Guardian angel confraternity") of Wilhering Abbey. Bruckner dedicated it to Adolf Dorfer, the abbot of the abbey. Bruckner set the music on the text written by Robert Riepl, one of the priests working at the abbey. Riepl's text is an adaptation of the text used by Orlande de Lassus. Bruckner's original manuscript, which was stored in the abbey, is lost. A copy of it is stored in the archive of the Kremsmünster Abbey and two other copies are found in the Austrian National Library. The motet was published in 1868 by the Wilhering Abbey.