Exodus 27:6-8

New Revised Standard Version, Anglicised

⁶ You shall make poles for the altar, poles of acacia wood, and overlay them with bronze; ⁷ the poles shall be put through the rings, so that the poles shall be on the two sides of the altar when it is carried. ⁸ You shall make it hollow, with boards. They shall be made just as you were shown on the mountain.