Reference for Chullin 261:8

לקח הימנו במשקל נותנן לכהן ומנכה לו מן הדמים

But if he bought them from him by weight, he must give them to a priest and [the seller] must allow a reduction in the price on that account.<span class="x" onmousemove="('comment',' V. infra 132a. In the first case the transaction implicitly excluded the maw for it is common knowledge that the maw belongs to the priest, hence it was not included in the sale; in the second case, however, the maw was included in the weight sold, and since it was not the seller's to sell the price must be reduced to that extent.');">⁶</span>

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow