וַיַּ֣עַשׂ לָ֗הּ אַרְבָּעָה֙ עַמּוּדֵ֣י שִׁטִּ֔ים וַיְצַפֵּ֣ם זָהָ֔ב וָוֵיהֶ֖ם זָהָ֑ב וַיִּצֹ֣ק לָהֶ֔ם אַרְבָּעָ֖ה אַדְנֵי־כָֽסֶף׃
And he made thereunto four pillars of acacia, and overlaid them with gold, their hooks being of gold; and he cast for them four sockets of silver.
Read kabbalistic (mystical) interpretation of Exodus 36:36: and classical mystical sources.