Keritot 28A

לכבשתו, והעני. הואיל ונדחה ⁠– ידחה.

instead of a female lamb, and he then became poorer, a bird pair is now the appropriate offering for him. Nevertheless, since his offering was disqualified at the outset because at that time he was obligated to bring a female lamb, it is permanently disqualified.

אמר רב הונא בריה דרב יהושע, שמע מינה תלת: שמע מינה בעלי חיים נדחים. וקדושת דמים (נדחה).

Rav Huna, son of Rav Yehoshua, said: One can conclude from this ruling 3 halakhot. Conclude from it that consecrated living animals can be permanently disqualified even if the animal is unblemished, as is the case with regard to this pair of birds. And conclude from it that when there is sanctity that inheres in an animal’s value, where the consecrated item will not be sacrificed as an offering, it can be disqualified. When he was wealthy and designated the bird pair as his offering, the two birds were consecrated only with sanctity that inheres in their value because they were unfit for sacrifice, and yet the birds were permanently disqualified.

ודחוי מעיקרא הוי דחוי.

And finally, conclude from this that a disqualification at the outset, when the animal is initially consecrated, is considered a permanent disqualification. Not only is an animal that was initially fit to be sacrificed and was later disqualified permanently disqualified, but even in a case such as this, where the birds were unfit for sacrifice from the beginning, the disqualification is permanent.

מתיב רב עוקבא בר חמא: המפריש נקבה לפסחו קודם הפסח ⁠– תרעה עד שתסתאב, ותמכר ויביא בדמיה פסח. ילדה זכר ⁠– ירעה עד שיסתאב, וימכר ויביא בדמיו פסח.

Rav Ukva bar Ḥama raises an objection from a baraita (Tosefta, Temura 2:3): With regard to one who designates a female animal for his Paschal offering before Passover, since the Paschal offering must be a male it is left to graze until it becomes blemished, at which point it is sold and one brings a Paschal offering with the money received from its sale. Similarly, if this animal gave birth to a male animal, the offspring is left to graze until it becomes blemished, at which point it is sold and one brings a Paschal offering with the money received from its sale.