In Exodus 30:17-21, there is a passage about the laver made of bronze.
When you open the gate of the tabernacle court and enter, you first encounter the altar of burnt offering, and next there is the laver. When you pass the altar of burnt offering in the tabernacle court and encounter the laver, you have come one step closer to the house of God by that much.
The laver was made by collecting and melting the bronze used in the mirrors of the women who served at the door of the tabernacle of meeting (Exodus 38:8). Because there was no glass at that time, they made mirrors using bronze and polished them until they became smooth and shiny to see their own faces reflected in them.

https://www.bjnewlife.org/
https://youtube.com/@TheNewLifeMission
https://www.facebook.com/shin.john.35