Reference for Pesachim 43:4
קסבר ר' אבהו כשהותרה נבילה היא וחלבה וגידה הותרה הניחא למאן דאמר יש בגידין בנותן טעם אלא למאן דאמר אין בגידין בנותן טעם מאי איכא למימר
- R'Abbahu holds, when nebelah was permitted [by the Torah]. it, its forbidden fat, and its thigh sinew were permitted.<span class="x" onmousemove="('comment',' Therefore benefit from all forbidden fat and all sinews is permitted.');"><sup>9</sup></span> This is well on the view that the sinews possess the power of imparting a taste.<span class="x" onmousemove="('comment',' E.g.. if forbidden sinews are boiled together with meat, they impart a flavour to the meat, which renders that too forbidden, unless it is sixty times as much as the sinews. On that view the sinews are as flesh, and therefore when nebelah was permitted it included the sinews.');"><sup>10</sup></span>