Reference for Bekhorot 7:6
הַמַּקִּישׁ בְּקַרְסֻלָּיו, וּבְאַרְכּוּבוֹתָיו, וּבַעַל פִּיקָה, וְהָעִקֵּל. אֵיזֶהוּ עִקֵּל, כֹּל שֶׁמַּקִּיף פַּרְסוֹתָיו וְאֵין אַרְכּוּבוֹתָיו נוֹשְׁקוֹת זוֹ לָזוֹ. פִּיקָה יוֹצְאָה מִגּוּדָלוֹ, עֲקֵבוֹ יוֹצֵא לַאֲחוֹרָיו, פַּרְסָתוֹ רְחָבָה כְּשֶׁל אַוָּז. אֶצְבְּעוֹתָיו מֻרְכָּבוֹת זוֹ עַל זוֹ, אוֹ קְלוּטוֹת (לְמַעְלָה) עַד הַפֶּרֶק, כָּשֵׁר. לְמַטָּה מִן הַפֶּרֶק וַחֲתָכָהּ, כָּשֵׁר. הָיְתָה בוֹ יְתֶרֶת וַחֲתָכָהּ, אִם יֵשׁ בָּהּ עֶצֶם, פָּסוּל. וְאִם לָאו, כָּשֵׁר. יָתֵר בְּיָדָיו וּבְרַגְלָיו שֵׁשׁ וָשֵׁשׁ עֶשְׂרִים וְאַרְבַּע, רַבִּי יְהוּדָה מַכְשִׁיר, וַחֲכָמִים פּוֹסְלִים. הַשּׁוֹלֵט בִּשְׁתֵּי יָדָיו, רַבִּי פּוֹסֵל, וַחֲכָמִים מַכְשִׁירִים. הַכּוּשִׁי, וְהַגִּיחוֹר, וְהַלַּבְקָן, וְהַקִּפֵּחַ, וְהַנַּנָּס, וְהַחֵרֵשׁ, וְהַשּׁוֹטֶה, וְהַשִּׁכּוֹר, וּבַעֲלֵי נְגָעִים טְהוֹרִין, פְּסוּלִין בָּאָדָם, וּכְשֵׁרִין בַּבְּהֵמָה. רַבָּן שִׁמְעוֹן בֶּן גַּמְלִיאֵל אוֹמֵר, שׁוֹטָה בַבְּהֵמָה אֵינָהּ מִן הַמֻּבְחָר, רַבִּי אֱלִיעֶזֶר אוֹמֵר, אַף בַּעֲלֵי דִלְדּוּלִין, פְּסוּלִין בָּאָדָם, וּכְשֵׁרִין בַּבְּהֵמָה:
One whose ankles or knees knock or a <i>ba'al pikah</i> or an <i>akel</i> - [these are blemishes]. Who is an <i>akel</i>? One who places his feet together and his knees do not touch. [Who is a <i>ba'al pikah</i>?] If a bunion extends from his thumb or big toe. [If] his heel juts out backward, or if his sole is as wide as that of a goose. If his fingers or toes lie on top of each other, or they are webbed up to the joint - he is valid; beyond the joint and he cut it - he is valid. If he had an extra [digit] and he cut it off, if there was a bone in it, he is invalid, but if not he is valid. If he had extra [digits] on his hands and feet - [if he has] six digits each [for a total of] twenty-four, Rabbi Yehuda validates him, but the Sages invalidate him. One who is ambidextrous - Rabbi [Yehudah HaNasi] invalidates him but the sages validate him. A dark-skinned person, or red-skinned or an albino or a very tall person or a dwarf or a deaf-mute or an insane person, or one who is drunk or one who has lesions [deemed] pure, these invalidate a person but are valid for an animal. Rabban Shimon ben Gamliel says: An insane animal is not considered choice [for sacrificial use], Rabbi Eliezer says also those with dangling [appendages of] flesh - this is invalid in a person but valid for an animal.