Temurah 9A

בוצינא טב מקרא.

A zucchini now is better than the possibility of a gourd later. There is no reason to give up an animal now for the hope of receiving another later.

מתני׳ ממירין מן הצאן על הבקר, ומן הבקר על הצאן, ומן הכבשים על העזים, ומן העזים על הכבשים, מן הזכרים על הנקבות, ומן הנקבות על הזכרים, מן התמימים על בעלי מומין, מן בעלי מומין על התמימים.

Mishnah: It is written: “He should neither exchange it, nor substitute it, good for bad, or bad for good; and if he substitutes an animal for an animal, then both it and its substitute should be sacred” (Leviticus 27:10). The Mishnah enumerates the consecrated and non-sacred animals this verse applies to. One substitutes for consecrated animals from the flock of sheep or goats, and the sanctity takes effect upon animals from the herd of cattle, and one substitutes from the herd and the sanctity takes effect upon animals from the flock. And one substitutes from the sheep and the sanctity takes effect upon the goats, and from the goats upon the sheep; and from the males upon the females, and from the females upon the males; and from the unblemished animals upon the blemished animals, and from the blemished animals upon the unblemished animals.

שנאמר: ״לא יחליפנו ולא ימיר אותו טוב ברע או רע בטוב״, ואיזהו ״טוב ברע״? בעלי מומין שקדם הקדישן את מומן.

The source for this is as it is stated: “He should neither exchange it, nor substitute it, good for bad, or bad for good” (Leviticus 27:10). And which is the case of good for bad where the substitution takes effect? It is a case where one substitutes for blemished animals whose consecration preceded their blemish. But if an animal was consecrated after it was blemished, substitution for it does not take effect.

גמ׳ מנא הני מילי? דתנו רבנן: ״בהמה בבהמה״⁠ — מכאן שממירין מן הצאן על הבקר, ומן הבקר על הצאן, מן הכבשים על העזים, ומן העזים על הכבשים, ומן הזכרים על הנקבות, ומן הנקבות על הזכרים, ומן בעלי מומין על התמימים, ומן התמימים על בעלי מומין.

Talmud: From where are these matters derived? They are derived from a verse, as A baraita states: The verse states: “And if he substitutes an animal for an animal, then both it and its substitute should be sacred” (Leviticus 27:10). When the verse states: “An animal for an animal,” from here it is derived that one substitutes for consecrated animals from the flock and the sanctity takes effect upon animals from the herd, and one likewise substitutes from the herd upon animals from the flock; and one substitutes from the sheep and the sanctity takes effect upon the goats, and from the goats upon the sheep; and from the males upon the females and from the females upon the males; and from the blemished animals upon the unblemished animals and from the unblemished animals upon the blemished animals.