17:13י״ז:י״ג
1 א

המול ימול יליד ביתך. כָּאן כָּפַל עָלָיו וְלֹא אָמַר לִשְׁמוֹנָה יָמִים לְלַמֶּדְךָ שֶׁיֵּשׁ יְלִיד בַּיִת נִמּוֹל לְאַחַר שְׁמוֹנָה יָמִים כְּמוֹ שֶׁמְּפֹרָשׁ בְּמַסֶּכֶת שַׁבָּת (דף קל"ה ב'):

המול ימול יליד ביתך HE THAT IS BORN IN THY HOUSE MUST NEEDS BE CIRCUMCISED — Here the statement that one born in the house must be circumcised is repeated but it does not say “after eight days” as in 5:12, thus teaching you that there are some cases of those “born in the house” who have to be circumcised on the first day of birth, as is explained in Treatise Sabbath (Shabbat 135b).