וְאַרְבָּעִ֥ים אַדְנֵיהֶ֖ם כָּ֑סֶף שְׁנֵ֣י אֲדָנִ֗ים תַּ֚חַת הַקֶּ֣רֶשׁ הָאֶחָ֔ד וּשְׁנֵ֣י אֲדָנִ֔ים תַּ֖חַת הַקֶּ֥רֶשׁ הָאֶחָֽד׃
and their forty sockets of silver: two sockets under one board, and two sockets under another board.
Read kabbalistic (mystical) interpretation of Exodus 36:26: and classical mystical sources.