Reference for Shabbat 211:6

שיעור המלבן כו': רב יוסף מחוי כפול רב חייא בר אמי מחוי פשוט:

-There he effects an improvement, even as R. Ashi [said]. For R. Ashi said: What is the difference whether one repairs [the foreskin by] circumcision or one repairs a utensil: what is the difference whether one boils [melts] the lead bar<span class="x" onmousemove="('comment',' Death by fire was carried out by pouring molten lead down the condemned person's throat, Sanh. 52a. ');">¹⁰</span> or one boils dyes?

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