Exodus 25:10

an ark.{Aron} denotes a chest, or coffer, in general; but is applied particularly to the chest or ark in which the testimony or two tables of the covenant were laid up; on the top of which was the propitiatory or mercy seat; and at the end of which were the cherubim of gold; between whom the visible sign of the presence of God appeared as seated upon his throne.

37:1-3; De 10:1-3; 2Ch 8:11; Heb 9:4; Re 11:19
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