How does one use subterfuge regarding a bechor? [Concerning] an animal that was pregnant with her first offspring, one declares, “What is in this one’s womb, if [it is] a male, it is an olah,” [if] she gave birth to a male, it is offered as an olah. And [if he declares,] “If it is a female, it is a shelamim-offering,” if she gave birth to a female, it is offered as a shelamim. [If one declares,] “If [the fetus] is a male, it is an olah, and if [it is] a female, it is a shelamim-offering”: [If] she [then] gave birth to a male and a female, the male is offered as an olah, and the female is offered as a shelamim.

If she gave birth to two males, one of them is offered as an olah, and the second one is sold to those who have an olah obligation, and its proceeds are chullin. If she gave birth to two females, one of them is offered as a shelamim, and the second one is sold to those who have a shelamim obligation, and its proceeds are chullin.  [If] she gave birth to a tumtum or an androgyne, Rabban Shimon ben Gamliel says: No sanctity takes effect upon them.

If one declares, “The fetus of this [pregnant ani-mal] is an olah, and she herself is a shelamim,” his declarations stand. [But if he declared,] “[The pregnant animal] is a shelamim and her fetus is an olah,” [the fetus] is the offspring of a shelamim; [these are] the words of R’ Meir. R’ Yose said: If he intended to [say] this from the outset, since it is impossible to utter two designations simulta- neously, his declarations stand. However, if after he declared, “This [pregnant animal] is hereby a shelamim,” he [then] reconsidered and declared, “Her fetus is an olah,” [the fetus] is the offspring of a shelamim.

[If one declares,] “This [animal] is hereby a temurah for an olah, a temurah for a shelamim,” it is thereby a temurah for an olah; [these are] the words of R’ Meir. R’ Yose said: If he intended to [say] this from the outset, since it is impossible to utter two designa- tions simultaneously, his declarations stand. However, if after he declared, “This is hereby a temurah for an olah,” he [then] reconsidered and declared “a temurah for a shelamim,” it is a temurah for an olah.

[If one declares,] “This [unconsecrated ani-mal] is hereby in place of this [offering],” “the substitute of this,” [or], “the exchange of this,” [the unconsecrated animal] thereby becomes a temurah. [However, if he declares,] “This [offering] is hereby deconsecrated onto that [unconsecrated animal],” [the unconsecrated animal] is not a temurah. But if the consecrated animal was blemished, then it becomes unconsecrated, but he must make up its value.

[If one declares,] “This [animal] is hereby in place of a chatas,” or, “in place of an olah,” he has not said anything. [However, if he declares,] “In place of this chatas,” or “in place of this olah,” or “in place of a chatas,” or “in place of an olah” “that I have in the house”; if he had [such an offering], his words stand.  If one declared regarding a nonkosher animal or blemished animal, “These are hereby an olah,” he has not said anything. “These are hereby for an olah,” [then] they are sold and he brings with their proceeds an olah.