Jubilees 15:25–34. Similar ideas underlie the metaphorical use of circumcision at Qumran (CD 16.4–6; 1QS 5.5) and perhaps a traditional Jewish blessing used at circumcision (Shabbat 137b and parallels). So David Flusser and Shmuel Safrai, “Who Sanctified the Beloved in the Womb?” Immanuel 11 (1980), pp. 46–55.