Ezekiel 16:61

⁶¹ And thou hast remembered thy ways, And thou hast been ashamed, In thy receiving thy sisters -- Thine elder with thy younger, And I have given them to thee for daughters, And not by thy covenant.

Brass

Brass and iron as in Isaiah 48:4 and Daniel 7:19 signify what is hard.

In Genesis 4:22, brass signifies natural good. (Arcana Coelestia 421)

In Numbers 21:9, this signifies the Lord's divine natural. (Apocalypse Revealed 49)

Brass also signifies the good in man's natural and the sensuous in the Lord. (Arcana Coelestia 197, Apocalypse Revealed 49, Apocalypse Explained 705)