The paper focuses on the quotations from Augustine’s Enarrationes in Psalmos graduum in the Liber glossarum. It aims to investigate the relation between the two works by identifying the branch of the tradition of the former text that was used by the compilers of the latter, in order to evaluate the reliability of the Liber glossarum as an indirect witness, through which to restore Augustine’s original text. After a brief introduction to the tradition of the Enarrationes in Psalmos graduum and to the working method adopted by the Liber glossarum compilers, a list of items drawn from Augustine’s work is given. The entries are analyzed in comparison with the text witnessed by the direct tradition: The glossary turns out to preserve an early stage of the transmission of its source, which would be otherwise lost
