Jah. (Jehovah). The abbreviated form of Jehovah, used only in poetry. It occurs frequently in the Hebrew, but with a single exception, Psalms 68:4, is rendered "Lord" in the Authorized Version. The identity of Jah and Jehovah is strongly marked in two passages of Isaiah - Isaiah 12:2; Isaiah 26:4. See Jehovah.
More than 4,500 subjects and proper names are defined and analyzed with corresponding Scripture references. Bible students have used "Smith's Bible Dictionary" since its introduction in the 1880s, making it a trustworthy classic.Wikipedia
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