אַ֣ךְ בְּֽכוֹר־שׁ֡וֹר אֽוֹ־בְכ֨וֹר כֶּ֜שֶׂב אֽוֹ־בְכ֥וֹר עֵ֛ז לֹ֥א תִפְדֶּ֖ה קֹ֣דֶשׁ הֵ֑ם אֶת־דָּמָ֞ם תִּזְרֹ֤ק עַל־הַמִּזְבֵּ֙חַ֙ וְאֶת־חֶלְבָּ֣ם תַּקְטִ֔יר אִשֶּׁ֛ה לְרֵ֥יחַ נִיחֹ֖חַ לַֽיהוָֽה׃
<span class="x" onmousemove="Show('perush','Este es el <b>108vo Precepto Negativo</b> enumerado por el Rambam en el Prefacio a Mishné Torá, su “Compendio de la Ley Hebrea” para todo el Pueblo de Israel.',event);" onmouseout="Close();">Mas el primogénito de vaca</span>, y el primogénito de oveja, y el primogénito de cabra, no redimirás; santificados son: la sangre de ellos rociarás sobre el altar, y quemarás la grosura de ellos, ofrenda encendida en olor suave al Señor.
Mishnah Bekhorot
If a ewe gave birth to what looked like a kid, or a [female] goat gave birth to what looked like a lamb, it is exempt from [the law of] the first born. But if it some of the signs of [its mother] it is liable [to the law of the first born].
Mishnah Temurah
The substitute of a first-born and an animal tithed, their young and the young of their young until the end of time, they are all treated like a first-born and an animal tithed, and are eaten by the owners when blemished. What is the difference between a first-born and an animal tithed [on the one hand] and other dedications [on the other]? All [blemished] dedications are sold in the market, killed in the market, and weighed by the pound, but not a first-born and an animal tithed. They [other dedications] and their substitutes are redeemed, but not a first-born and an animal tithed. They [other dedications] come from outside the land [to the land], but not a first-born and an animal tithed. [If] they however came from [outside the holy land] unblemished, they are offered, if blemished they are eaten by their owners with their blemishes. Rabbi Shimon: what is the reason? Because a first-born and an animal tithed have a remedy wherever they are, whereas all other dedications, although a blemish has occurred in them, remain holy.