Exodus 38:6-8

Amplified Bible

⁶ And he made the carrying poles of acacia wood and overlaid them with bronze. ⁷ He put the poles through the rings on the sides of the altar, with which to carry it; he made it hollow with planks.

⁸ Bezalel made the basin and its base of bronze from the mirrors of the attending women who served and ministered at the doorway of the Tent of Meeting.