Reference for Chullin 266:36

אמר רב חסדא

The four [that are enjoyed] in Jerusalem are: the firstling, the firstfruits, that which is taken away as a heave-offering from the thank-offering<span class="x" onmousemove="('comment',' Sc., the breast and the thigh and the four loaves; cf. ibid. VII, 11-14.');">²¹</span>

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