וּמִן־בְּנֵ֧י הַקְּהָתִ֛י מִן־אֲחֵיהֶ֖ם עַל־לֶ֣חֶם הַֽמַּעֲרָ֑כֶת לְהָכִ֖ין שַׁבַּ֥ת שַׁבָּֽת׃ (ס)
And some of their brethren, of the sons of the Kohathites, were over the showbread, to prepare it every sabbath.
Read midrashic interpretation of I Chronicles 9:32: and classical rabbinic exegesis.