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The '''Hieratikon''' (also spelled ''Ieratikon'', also known as the ''Hierotelestikon'' and the ''Liturgikon''; Slavonic: '''''Sluzhebnik'''''), the "book of the priest," is the Book of Rites of the [[Orthodox Church]] that contains the priest's prayers for [[Vespers]], [[Orthros]], and [[Divine Liturgy|Divine Liturgies]] of St. [[John Chrysostom]], St. [[Basil the Great]], and the [[Liturgy of the Presanctified Gifts]]. These texts usually also include additional sections, such as a the [[Dismissal]]s for various days of the week and for [[Great Feasts]], [[Prokeimenon|Prokeimena]], the [[Menologion]], [[Megalynarion|Magnifications]] (Slavonic: ''Velichaniye'') for feast days, and instructional material which explains what clergy should do in the case of various unexpected occurrences in the services.