Sefer HaChinukh Mitzvah 383
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שֶׁלֹּא לִשְׁבֹּר עֶצֶם מֵעַצְמוֹת פֶּסַח שֵׁנִי – שֶׁלֹּא לִשְׁבֹּר עֶצֶם מִכָּל עַצְמוֹת הַפֶּסַח. שֶׁנֶּאֱמַר (במדבר ט יב) וְעֶצֶם לֹא יִשְׁבְּרוּ בוֹ. כָּל עִנְיָן לָאו זֶה מְכֻוָּן בַּלָּאו הַבָּא עַל זֶה גַּם כֵּן בְּפֶסַח רִאשׁוֹן בְּסֵדֶר בֹּא אֶל פַּרְעֹה וְהוּא שָׁם (מצוה טז), תִּרְאֶנּוּ מִשָּׁם אִם רְצוֹנְךָ לָדַעַת.
Not to break a bone from the bones of the Pesach Sheni sacrifice: Not to break a bone from all of the bones of the Pesach sacrifice, as it is stated (Numbers 9:12), “and a bone they shall not break in it.” All of the content of this negative commandment is reflected in the negative commandment that comes about this also on the first Pesach, which is written in the Order of Bo el Pharaoh (Sefer HaChinukh 8). And it is there — see it there if you want to know.