Entrance Antiphon, Cf. Ps 68(67):8-9, 20:O God, when you went forth before your people, marching with them and living among them, the earth trembled, heavens poured down rain, alleluia.Saints Nereus and Achilleus were Roman soldiers in the household of Flavia Domitilla. They were instructed and converted by St. Peter. These two soldiers in turn inspired St. Domitilla to consecrate her virginity to God. Thereupon, Aurelianus, the fiancee of Domitilla, reported all three to the Roman authorities as being Christians. They were martyred out of hatred for Christianity.