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KJV - Let their eyes be darkened, that they may not see, and bow down their back alway.
ASV - Let their eyes be darkened, that they may not see, And bow thou down their back always.
BBE - Let their eyes be made dark so that they may not see, and let their back be bent down at all times.
WEB - Let their eyes be darkened, that they may not see. Bow down their back always."
YLT - let their eyes be darkened -- not to behold, and their back do Thou always bow down.'