The Byzantine Liturgy is the product of a complex evolution that began before the time of Christ. Like its Western counterpart, the eucharistic service of the Eastern Orthodox churches consists of two parts. The first, the Liturgy of the Word, developed from the services of the Jewish synagogue. The second, the Liturgy of the Faithful, evolved from the prayer of blessing or brakah of the Passover and other Jewish religious meals.
The “Lord’s Prayer” and “Our Father” are traditional names given to the set of petitions and doxologies recorded in Matthew 6:9–13 and Luke 11:2–4, which Jesus gave his disciples as a model or example for prayer. The prayer has been included in the catechisms and liturgies of most Christian traditions since the period of the apostolic fathers, usually in close association with the partaking of the Lord’s Supper.
Jesus gave his disciples a model to follow in the Lord’s Prayer. In this prayer, Jesus brings to a clear focus many expressions and elements already present in first-century Jewish synagogue worship.