Reference for Pesachim 191:24

ונאכל בחפזון וכו': מנא לן דאמר קרא (שמות יב, יא) ואכלתם אותו בחפזון אותו נאכל בחפזון ואין אחר נאכל בחפזון:

But if so, [when it is written, But every man's servant that is bought for money,] when thou hast circumcised him, then shall he eat thereof,<span class="x" onmousemove="('comment',' Ibid. 44.');">³²</span> - does that too [intimate] that he must not eat thereof, but he does eat of the annual Passover? - Scripture saith, 'then thou shalt keep [etc.]'.

Jastrow