פָּנִ֣ים ׀ בְּפָנִ֗ים דִּבֶּ֨ר יְהוָ֧ה עִמָּכֶ֛ם בָּהָ֖ר מִתּ֥וֹךְ הָאֵֽשׁ׃
The LORD spoke with you face to face in the mount out of the midst of the fire—
Rashi on Deuteronomy
פנים בפנים FACE TO FACE — R. Berechia said: Thus did Moses, in effect, say: Do not think that I am misleading you with something which does not exist at all, as an agent does acting between the vendor and the purchaser; behold, the seller Himself is speaking to you (God who transmitted the Torah to you) (cf. Pesikta Rabbati 21: Pesachim Rabbah פ' י' הדברות קמייתא).
Sforno on Deuteronomy
פנים בפנים, not in a nocturnal vision when you were asleep.