The article presents the history of the manuscript tradition and the study of one of the most ancient canon law text of Slavic writing – the psedoepigraphic Commandment of John Chrysostom on church law. It is widely distributed as part of the Slavonic Trebniks of the 14th century, preserved in library collections of the Chilandar Monastery, the Pechsky Patriarchate, and Dečan Monastery. The editions of the text in East Slavic writing are indicated for the first time. Particular attention is paid to the Commandments as part of the Myasnikovskaya Kormčaja, whose compiler introduced significant changes in the text, expanding in every possible way the rights of the “spiritual fathers”. The Commandment is presented in short and abbreviated form in miscellaneas in the monastery libraries of the Russian north and the Chudovsky monastery. Based on the vocabulary of the Commandment comparison with the vocabulary of Svyatosavskaya Kormčaja, the author makes an assumption on the possible belonging of the text to the earlier, Ohrid period of the history of Slavic writing.