Exodus 25:5
acacia wood <06086 07848> [shittim wood.]
Exodus 25:10
ark <0727> [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.
