The text of the Sermon usually is included in the Slavonic miscellanies entitled Zlatostruj (both in the short and in the complete version) was published first by N. L. Tunickij, who supposed that it is attributed to St. Kliment of Ochrida. The same opinion was declared by many other authors (B. Angelov, K. Kuev, X. Kodov, Kl. Ivanova, etc.) The main argument was common places in the text and similar readings with this Sermon and otherKliment’s works. The author of the current paper analyses a short version of the Sermon about being and the Judgment in an unpublished manuscript of 16th c. (RNB OCRK F.I.4). This codex (possibly of ruthenian origin) is a miscellany of mixed content with archaic features of language and contains many translated works of Basil of Caesarea, Ephrem the Syrian, Gregory the Theologian, etc. In the conclusion the author assumes that the Sermon there was a short vesrion of the Sermon in the early stage of Old Church Slavonic literature.The publication of the copy is enclosed.