וּשְׁתֵּי֩ טַבְּעֹ֨ת זָהָ֜ב עָֽשָׂה־ל֣וֹ ׀ מִתַּ֣חַת לְזֵר֗וֹ עַ֚ל שְׁתֵּ֣י צַלְעֹתָ֔יו עַ֖ל שְׁנֵ֣י צִדָּ֑יו לְבָתִּ֣ים לְבַדִּ֔ים לָשֵׂ֥את אֹת֖וֹ בָּהֶֽם׃
And he made for it two golden rings under the crown thereof, upon the two ribs thereof, upon the two sides of it, for holders for staves wherewith to bear it.
Read kabbalistic (mystical) interpretation of Exodus 37:27: and classical mystical sources.