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23 我必使瘟疫进入西顿,使血流在他街上。被杀的必在其中仆倒,四围有刀剑临到他,人就知道我是耶和华。
'Perpetual' in the literal sense, means to the end of one's life, after death, and eternity.
(References: Arcana Coelestia 8991)