Reference for Pesachim 173:2
יתום ששחטו עליו אפוטרופסין יאכל במקום שהוא רוצה עבד של שני שותפין לא יאכל משל שניהן מי שחציו עבד וחציו בן חורין לא יאכל משל רבו:
AN ORPHAN ON WHOSE BEHALF HIS GUARDIANS SLAUGHTERED<span class="x" onmousemove="('comment',' He had more than one guardian, and each kind a Passover-offering with him as one of its eaters.');"><sup>2</sup></span> MAY EAT WHEREVER HE PLEASES. A SLAVE OF TWO PARTNERS MAY NOT EAT OF EITHER.<span class="x" onmousemove="('comment',' Even if one specifically registered him in his company, since half of the slave belongs to another man. Hence he may eat only if both agree that he should be registered with one. - A slave in a Jewish house has the status of a semi-Jew, and if circumcised he ate of the Paschal offering');"><sup>3</sup></span>