It looks like you have come across a digital reference to a specific volume of biblical scholarship. The phrase you posted corresponds to a very famous collection of writings.
: A unique retelling of Job's trials and steadfastness. Testament of Moses : An apocalyptic vision given to Joshua. Apocrifos Del Antiguo Testamento Tomo V Pdf 43
: A major highlight is the Testaments of the Twelve Patriarchs , where each son of Jacob reflects on his life, his sins (like Reuben’s lust or Simeon’s envy), and offers a warning to future generations. It looks like you have come across a