עֶרְוַ֤ת בַּת־בִּנְךָ֙ א֣וֹ בַֽת־בִּתְּךָ֔ לֹ֥א תְגַלֶּ֖ה עֶרְוָתָ֑ן כִּ֥י עֶרְוָתְךָ֖ הֵֽנָּה׃ (ס)
The nakedness of thy son’s daughter, or of thy daughter’s daughter, even their nakedness thou shalt not uncover; for theirs is thine own nakedness.
Related passages and parallel verses for Leviticus 18:10.