For this feast of St. Augustine, August 28, a prayer taken from a 1959 Maryknoll missal:

O MOST HOLY, O most benign, O noble and glorious Virgin Mary, who was worthy to bear in your sacred womb the Creator of all and at your virginal breast to nourish him whose true, real, and most holy body and blood I, an unworthy sinner, have just now dared to receive: I humbly ask you to intercede with him for me, a sinner; that whatsoever, by ignorance or neglect, accident or irreverence, I have left undone or have done amiss, in this unspeakably holy sacrifice, may be pardoned through your prayers to the same our Lord Jesus Christ, your Son, who with the Father and the Holy Spirit lives and reigns world without end. Amen.