Breast and Thigh as Priestly Shares
Paul actually uses this kind of Torah provision: altar servants receiving sacred portions becomes part of his inspired argument that gospel workers may receive material support.
Where this fits in the story: Exodus 29:22–28 already assigns wave/contribution portions during priestly ordination.
Where Scripture takes it next: 1 Corinthians 9:13–14 — very strong inspired use. Paul explicitly appeals to temple/altar workers sharing in sacred provisions when arguing for material support of gospel workers.