Preces are the prayers that in modern Liturgy of the Hours are recited during Morning Prayer (invocationes) and Vespers (intercessiones). For centuries they were usually composed of psalm verses quotes and placed in different canonical hours. Contemporary preces created after the Second Vatican Council by Coetus XII bis are generally not. The author of the presentation entitled “The Word of God in the preces of the Vespers on Epiphany”, considering the record of Sacra Congregatio pro Cultu Divino, Commissio specialis ad instaurationem liturgicam absolvendam, Schemata n. 348, pointed out some expressions and phrases in verses 2, 6, 7, 12 i 17 of Psalm 71, which belongs to royal prayers, as the biblical source for preces on the Feast of Epiphany. The result of his research is an observation that Scriptura crescit cum orante, not only during reading of the text but above all as the updating in the course of the rite, which dynamism feeds the prayer so lavishly that the Word of God becomes his own and motivates him to compose a personal prayer. Keywords: Word of God, preces, Vespers, Epiphany.