TT #758 · Parashas Ki Seitzei · Seventh Aliyah · Passuk 25:10
And his name shall be called in Israel “the house of him who had his shoe drawn off.”
Torah Temimah points to Yevamot 101b.
TT lemma: בְּיִשְׂרָאֵל.
בְּיִשְׂרָאֵל – אֲפִלּוּ אִמּוֹ מִיִּשְׂרָאֵל לֹא מְהַנֵּי, אֶלָּא צָרִיךְ אָבִיו וְאִמּוֹ מִיִּשְׂרָאֵל.
English: “In Israel” — even if his mother is an Israelite it does not suffice; both his father and his mother must be Israelites.
On the daf / in context: The court (or the man being designated) must meet a strict standard of Israelite lineage for this particular proclamation.
Stringent reading of “in Israel.”
For the purposes of this designation, full Israelite parentage is required.