Do not have sexual relations with your mother's sister

'You shall not uncover the nakedness of your mother's sister, for she is your mother's blood relative.

Hebrew

יג עֶרְוַת אֲחוֹת-אִמְּךָ, לֹא תְגַלֵּה: כִּי-שְׁאֵר אִמְּךָ, הִוא. {ס}

Greek

13 ἀσχημοσύνην ἀδελφῆς μητρός σου οὐκ ἀποκαλύψεις· οἰκεία γὰρ μητρός σού ἐστιν.

• Parashah: Acharei Mot
• Sefer HaChinuch: 198
• Mishneh Torah: Holiness — Forbidden Sexual Relations

• Leviticus 18:13

Enumeration and classification from BibleData. The Greek is the Septuagint reading of the same verse, carried by the source for comparison.