וַיַּ֥עַשׂ בְּרִיחֵ֖י עֲצֵ֣י שִׁטִּ֑ים חֲמִשָּׁ֕ה לְקַרְשֵׁ֥י צֶֽלַע־הַמִּשְׁכָּ֖ן הָאֶחָֽת׃
And he made bars of acacia-wood: five for the boards of the one side of the tabernacle,
Read midrashic interpretation of Exodus 36:31: and classical rabbinic exegesis.