Reference for Pesachim 148:1
מידב דייבי
[the blood] indeed oozes out.<span class="x" onmousemove="('comment',' The animal being hung throat downwards.');"><sup>1</sup></span> Shall we say that this supports him: The heart must be torn and the blood withdrawn;<span class="x" onmousemove="('comment',' Before it is boiled; the heart is full of blood and therefore ordinary salting, as is done with other flesh, is insufficient.');"><sup>2</sup></span> if he did not tear i [open], he must tear it after it is boiled<span class="x" onmousemove="('comment',' Rashi: this is assumed to mean, after it is roasted over an open fire, roasting being occasionally referred to as boiling, v. II Chron. XXXV, 13: and they boiled (wa-yebashshelu) the passover with fire according to the ordinance.');"><sup>3</sup></span>