Exodus 38:6-8

New International Version

⁶ They made the poles of acacia wood and overlaid them with bronze. ⁷ They inserted the poles into the rings so they would be on the sides of the altar for carrying it. They made it hollow, out of boards.

The Basin for Washing

⁸ They made the bronze basin^(A) and its bronze stand from the mirrors of the women^(B) who served at the entrance to the tent of meeting.