A sectarian text that gives the group's entrance requirements, plus regulations governing life in the Qumran community.
It was one of the seven scrolls from cave one (1Q) found with the Dead Sea Scrolls. Fragmentary manuscripts of it were found in other caves, too.
(The Origin of the Bible: Newly Updated by F. F. Bruce, J. I. Packer, Philip W. Comfort, and Carl F. H. Henry, 2020. Texts and Manuscripts of the Old Testament by Mark R. Norton, Page 164)