Reference for Exodus 38:20

וְֽכָל־הַיְתֵדֹ֞ת לַמִּשְׁכָּ֧ן וְלֶחָצֵ֛ר סָבִ֖יב נְחֹֽשֶׁת׃ (ס)

And all the pins of the tabernacle, and of the court round about, were of brass.

BDB