כִּ֚י אִם־לִשְׁאֵר֔וֹ הַקָּרֹ֖ב אֵלָ֑יו לְאִמּ֣וֹ וּלְאָבִ֔יו וְלִבְנ֥וֹ וּלְבִתּ֖וֹ וּלְאָחִֽיו׃
maliban lamang sa kanyang kamag-anak na malapit sa kanya: sa kanyang ina, sa kanyang ama, sa kanyang anak na lalaki, sa kanyang anak na babae, at sa kanyang kapatid na lalaki;
Tosafot
"In what did He immerse?" -- the heretic did not ask, "how was He allowed to become impure [by burying Moshe]?". This is because the Jews are called children of God [and kohanim are allowed to become impure for their deceased children].