Benediction of the Blessed Sacrament begins with the Exposition of the Blessed Sacrament (i.e., consecrated Host) in a monstrance set upon the altar. The liturgy includes singing the ancient Latin hymns written by St Thomas Aquinas, O Salutaris Hostia and Tantum Ergo, followed by the benediction proper. The celebrant holds the monstrance wearing a humeral veil covering his shoulders, arms and hands, and then blesses the faithful with the Blessed Sacrament by tracing the sign of the cross with the monstrance held steadily upright before him. The liturgy concludes with the Divine Praises and Psalm 117 with the antiphon, "Let us forever adore the Most Holy Sacrament."