AKA The Hymns of Thanksgiving.
A sectarian text that includes ~30 hymns, probably composed by one individual.
It was one of the seven scrolls from cave one (1Q) found with the Dead Sea Scrolls.
(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)