כָּֽל־הַבְּכ֡וֹר אֲשֶׁר֩ יִוָּלֵ֨ד בִּבְקָרְךָ֤ וּבְצֹֽאנְךָ֙ הַזָּכָ֔ר תַּקְדִּ֖ישׁ לַיהוָ֣ה אֱלֹהֶ֑יךָ לֹ֤א תַעֲבֹד֙ בִּבְכֹ֣ר שׁוֹרֶ֔ךָ וְלֹ֥א תָגֹ֖ז בְּכ֥וֹר צֹאנֶֽךָ׃
Bawat panganay na lalaki na isisilang sa iyong mga baka at sa iyong kawan ay ilalaan mo sa Walang-Hanggan na iyong Diyos; huwag mong pagtrabahuhin ang panganay ng iyong baka, at huwag mong gupitan ng balahibo ang panganay ng iyong kawan.
Mishnah Bekhorot
[An Israelite] who buys a fetus of a donkey belonging to a non-Jew or who sells one to him, although this is not permitted, or who forms a partnership with him, or who receives [an animal] from him to look after or who gives [his donkey] to him to look after, is exempt from the [law of the] bekhor, for it says: [“I sanctified to me all the firstborn] in Israel,” (Numbers 3:13) but not in non-Jews. Priests and levites are exempt through [an argument made by a] kal vehomer: if they exempted the first-born belonging to the Israelites in the wilderness, it follows all the more so that they should exempt their own.
Mishnah Bekhorot
Rabbi Yose ben Meshullam says: one who slaughters the first born, [first] clears a space with the [butcher's] knife on both sides and tears the hair, as long as he does not remove the wool from its place. And similarly one may tear the hair to show the place of the blemish [to a sage].
Mishnah Megillah
On Pesah we read from the portion of the festivals in Leviticus (Torat Kohanim) (Leviticus 23:4). On Shavuot, “Seven weeks” (Deuteronomy 16:9). On Rosh Hashanah “On the seventh day on the first of the month” (Leviticus 23:2. On Yom Hakippurim, “After the death” (Leviticus. On the first day of the Festival [of Sukkot] they read from the portion of the festivals in Leviticus, and on the other days of the Festival [of Sukkot] the [sections] on the offerings of the Festival.