Reference for Pesachim 121:4

אלא אמר רבא פסח ששחטו בשאר ימות השנה בשינוי בעלים נעשה כמי שאין לו בעלים בזמנו ופסול:

Again, as to what he says. A change of owners is not [operative as a disqualification] after death, then according to R'Phineas the son of R'Ammi who maintained, There is [a disqualification in] a change of owner after death, what is there to be said? Two [of these distinctions] are nevertheless exact! Rather, said Raba: A Paschal lamb which he slaughtered during the rest of the year with a change of owners is regarded as though it had no owners in its proper time,<span class="x" onmousemove="('comment',' I.e., as though it were slaughtered on Passover eve as a Passover sacrifice, but for no persons in particular.');">⁶</span>

Jastrow

Jastrow