The aim of this article is to make known a commentated Church Slavonic version of the Psalms which appears to have been compiled in the East Slav area, probably in the late fourteenth century, and which has not hitherto been the object of scholarly investigation. The description which follows is based on three manuscripts, containing essentially the same catena, although with a number of variant readings; it is hoped that this brief account may lead to the identification of other manuscripts of the same text and to elucidation of the circumstances in which it was compiled.