The land that Moses assigned to the tribes of Israel is spoken of as if it were an inheritance that they received as a permanent possession. (See: [[rc://en/ta/man/jit/figs-metaphor]])
The writer speaks of the great honor that the Levites had by serving Yahweh as priests as if the offerings were something that they would inherit. Alternate translation: "The offerings of Yahweh ... are what they will have for their provision" (See: [[rc://en/ta/man/jit/figs-metaphor]])