Bible translations into Church Slavonic
The oldest translation of the Bible into a Slavic language, Old Church Slavonic, has close connections with the activity of the two apostles to the Slavs, Cyril and Methodius, in Great Moravia in 864–865. The oldest manuscripts use either the so-called Cyrillic or the Glagolitic alphabets.
Source: Wikipedia — Bible translations into Church Slavonic (CC BY-SA 4.0)