1 Chronicles 23:27-29

27For by the last words of David the sons of Levi were numbered from atwenty years old and upward. 28For their duty was to assist the sons of Aaron for the service of the house of the Lord, having the care of the courts and the chambers, the cleansing of all that is holy, and any work for the service of the house of God. 29Their duty was also to assist with the bshowbread, the cflour for the grain offering, the wafers of unleavened bread, the dbaked offering, the eoffering mixed with oil, and all fmeasures of quantity or size.
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