Reference for Pesachim 240:8

אם כן מה ת"ל בלילה יכול יהא נאכל כקדשים ביום ת"ל בלילה בלילה הוא נאכל ואינו נאכל ביום

R'Eleazar B''Azariah said: 'In that night' is stated here while elsewhere it is stated, For I will go through the land of Egypt in that night:<span class="x" onmousemove="('comment',' Ibid. 12.');">⁵</span> just as there it means midnight, so here too [they may eat the Passover-offering] until midnight.<span class="x" onmousemove="('comment',' After which it is nothar.');">⁶</span>

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