וַיַּ֥עַשׂ אֶת־הַקְּרָשִׁ֖ים לַמִּשְׁכָּ֑ן עֶשְׂרִ֣ים קְרָשִׁ֔ים לִפְאַ֖ת נֶ֥גֶב תֵּימָֽנָה׃
And he made the boards for the tabernacle; twenty boards for the south side southward.
Read kabbalistic (mystical) interpretation of Exodus 36:23: and classical mystical sources.