Study Temurah folio 5B with parallel Hebrew-English text, traditional commentary, and modern study tools. Free access to Babylonian Talmud online.
And according to the opinion of Rava, this term: “Is most holy,” serves to exclude the case of a firstborn offering from the prohibition of sale. As it is taught in a baraita: It is stated with regard to a firstborn offering: “But the firstling of an ox, or the firstling of a sheep, or the firstling
The Talmud objects: But isn’t there the case of substitution, with regard to which God states: “He shall not exchange it, nor substitute it” (Leviticus 27:10), and it is taught in the Mishnah (2a): That is not to say that it is permitted for a person to effect substitution; rather, it means that i
The Talmud explains that Rava could say to you: It is different there, as that same verse states: “And if he shall at all substitute animal for animal, then both it and that for which it is substituted shall be holy,” which teaches that his action is effective in this context specifically.
And according to the opinion of Abaye, that transgressions are effective in general, that clause is still necessary, because if God had not stated: “Both it and that for which it is substituted shall be holy,” I would say that this initially consecrated animal will leave its consecrated state, and
The Talmud objects: But isn’t there the case of a firstborn offering, with regard to which God states: “But the firstling of an ox, or the firstling of a sheep, or the firstling of a goat, you shall not redeem; they are holy” (Numbers 18:17)? And we learned in a Mishnah (21a): All sacrificial anim