Reference for Pesachim 240:7

אמר לו ר"ע והלא נאמר חפזון עד שעת חפזון

It is R'Eleazar B''Azariah. For it was taught: And they shall eat the flesh in that night.'<span class="x" onmousemove="('comment',' Ex. XII, 8.');"><sup>4</sup></span>