The discoveries from the caves of Qumran yielded hundreds of psalms and prayers. Some of these derived from the sectarian community known as the Yaḥad, who lived there. Others came from diverse Jewish communities, and were preserved and presumably used by the Yaḥad as part of their twice-daily “offering of the lips” as an alternative to the “defiled” sacrifices being offered in the Temple. These documents offer invaluable evidence concerning the origin of fixed communal prayer in Judaism.