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Testimony, Tabernacle OfEASTON'S
The tabernacle, the great glory of which was that it contained “the testimony”, i.e., the “two tables” (Ex. 38:21). The ark in which these tables were deposited was called the “ark of the testimony” (40:3), and also simply the “testimony” (27:21; 30:6).
Easton's Illustrated Bible Dictionary, 3rd ed. (1897), public domain.