Two unusual though markedly different religious groups should at least be mentioned in passing, for both had recourse to extra-Biblical writings, claimed as inspired, as authority for certain of their beliefs and practices. One group was the Shakers, clustered in a dozen communities, who also were millennialists, as they conceived it, and cried out a certain warning concerning Christ’s second coming. PFF4 287.3
The other was Mormonism, or the Latter-day Saints, who likewise sought to cite prophecy to sustain their unusual positions. But, as both of these lie outside the purview of our fundamental study, we pass them with this brief reference. PFF4 288.1