The Sacramentary of Serapion of Thmuis ( 330–360) is a prayer-book or sacramentary (euchologion) intended for the use of bishops.
The sacramentary includes the earliest recorded use of the Sanctus.
Sacramentary
This sacramentary, contained in a collection of Egyptian documents in an 11th-century manuscript at the Great Lavra on Mount Athos, was published by A. Dmitrijewskij in 1894, but attracted little attention until independently discovered and published by G. Wobbermin in 1899. It is a celebrant's book, containing thirty prayers belonging to the Divine Liturgy or Mass (19-30, 1-6), baptism (7-11, 15, 16), ordination (12-14), benediction of oil, bread and water (17), and burial (18), omitting the fixed structural formulae of the rites, the parts of the other ministers, and almost all rubrication, except what is implied in the titles of the prayers.