וַיִּצֹ֞ק אַרְבַּ֧ע טַבָּעֹ֛ת בְּאַרְבַּ֥ע הַקְּצָוֺ֖ת לְמִכְבַּ֣ר הַנְּחֹ֑שֶׁת בָּתִּ֖ים לַבַּדִּֽים׃
And he cast four rings for the four ends of the grating of brass, to be holders for the staves.
Targum Jonathan on Exodus
And he cast four rings, for the four corners of the grate, of brass, (to be) places for the staves.