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For the demon born of an echo we have an analogue in the Hebrew Bath Kol, "the daughter of a voice." In the Gnostic Hymn to Hermes, edited by Dieterich, Abrasax, p 19, we read, l. 104...
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So I commanded her to spin the hemp for the ropes used in the building of the house of God; and accordingly, when I had sealed and bound her, she was so overcome and brought to naught as to stand night and day spinning the hemp.