וְאֹתִ֞י צִוָּ֤ה יְהוָה֙ בָּעֵ֣ת הַהִ֔וא לְלַמֵּ֣ד אֶתְכֶ֔ם חֻקִּ֖ים וּמִשְׁפָּטִ֑ים לַעֲשֹׂתְכֶ֣ם אֹתָ֔ם בָּאָ֕רֶץ אֲשֶׁ֥ר אַתֶּ֛ם עֹבְרִ֥ים שָׁ֖מָּה לְרִשְׁתָּֽהּ׃
And the LORD commanded me at that time to teach you statutes and ordinances, that ye might do them in the land whither ye go over to possess it.
Rashi on Deuteronomy
ואתי צוה, ה' ללמד אתכם AND THE LORD COMMANDED ME TO TEACH YOU, the Oral Law.
Rabbeinu Bahya
.ואותי צוה ה’ בעת ההיא..ללמד אתכם חקים ומשפטים , “and the Lord commanded me at that time to teach you statutes, social laws, etc.” These are the other commandments of the Torah, the ones in addition to the Ten Commandments which were commanded at Mount Sinai (Ibn Ezra). Rashi understands the words ואותי צוה as referring to the oral Torah.