What contains the prayers the priest prays?

The prayers that the priest prays during a liturgical service are typically found in the missal, a book that contains the texts for the Mass and other sacraments. These prayers include the Eucharistic Prayer, the prayers of the faithful, and various collects and blessings. Additionally, specific prayers may be included in liturgical books relevant to particular seasons, feasts, or occasions. Overall, these texts guide the priest in leading the congregation in worship and supplication.